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Title: Low-lying states in Ra 219 and Rn 215 : Sampling microsecond α -decaying nuclei

Abstract

© 2018 American Physical Society. Short-lived α-decaying nuclei "northeast" of Pb208 in the chart of nuclides were studied using the reaction Ca48+Am243 with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even Ra220 and its odd-A neighbors, Fr219, and Ra221,219, with a focus on the Ra219→Rn215 decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of Ra219 is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [4];  [8];  [9];  [10];  [5] more »;  [10];  [11];  [12];  [13];  [5];  [13];  [5];  [5];  [7];  [5];  [5];  [5];  [14];  [8];  [15];  [12];  [16]; ORCiD logo [11];  [5];  [5];  [5];  [8];  [7];  [5];  [17];  [12];  [8];  [5] « less
  1. Lund Univ., Lund (Sweden)
  2. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany); GANIL, Caen (France)
  3. Helmholtz Inst. Mainz, Mainz (Germany)
  4. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany); Helmholtz Inst. Mainz, Mainz (Germany); Johannes Gutenberg-Univ. Mainz, Mainz (Germany)
  5. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany)
  6. Univ. of Liverpool, Liverpool (United Kingdom); Lund Univ., Lund (Sweden)
  7. Johannes Gutenberg-Univ. Mainz, Mainz (Germany)
  8. Helmholtz Inst. Mainz, Mainz (Germany); Johannes Gutenberg-Univ. Mainz, Mainz (Germany)
  9. Helmholtz Inst. Mainz, Mainz (Germany); Groningen, Groningen (Netherlands)
  10. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  11. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  12. Univ. of Liverpool, Liverpool (United Kingdom)
  13. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany); Helmholtz Inst. Mainz, Mainz (Germany)
  14. Univ. of Liverpool, Liverpool (United Kingdom); Helmholtz Inst. Mainz, Mainz (Germany)
  15. Univ. of Oslo, Oslo (Norway)
  16. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany); Johannes Gutenberg-Univ. Mainz, Mainz (Germany)
  17. Paul Scherrer Inst. and Univ. of Bern, Villigen (Switzerland)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1571859
Alternate Identifier(s):
OSTI ID: 1477543; OSTI ID: 1650034
Grant/Contract Number:  
AC05-00OR22725; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 98; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Såmark-Roth, A., Sarmiento, L. G., Rudolph, D., Ljungberg, J., Carlsson, B. G., Fahlander, C., Forsberg, U., Golubev, P., Ragnarsson, I., Ackermann, D., Andersson, L. -L., Block, M., Brand, H., Cox, D. M., Di Nitto, A., Düllmann, Ch. E., Eberhardt, K., Even, J., Gates, J. M., Gerl, J., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Jäger, E., Khuyagbaatar, J., Kindler, B., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Omtvedt, J. P., Papadakis, P., Runke, J., Rykaczewski, Krzysztof, Schädel, M., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Trautmann, N., Torres, T., Türler, A., Ward, A., Wiehl, N., and Yakushev, A. Low-lying states in Ra219 and Rn215: Sampling microsecond α-decaying nuclei. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.98.044307.
Såmark-Roth, A., Sarmiento, L. G., Rudolph, D., Ljungberg, J., Carlsson, B. G., Fahlander, C., Forsberg, U., Golubev, P., Ragnarsson, I., Ackermann, D., Andersson, L. -L., Block, M., Brand, H., Cox, D. M., Di Nitto, A., Düllmann, Ch. E., Eberhardt, K., Even, J., Gates, J. M., Gerl, J., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Jäger, E., Khuyagbaatar, J., Kindler, B., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Omtvedt, J. P., Papadakis, P., Runke, J., Rykaczewski, Krzysztof, Schädel, M., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Trautmann, N., Torres, T., Türler, A., Ward, A., Wiehl, N., & Yakushev, A. Low-lying states in Ra219 and Rn215: Sampling microsecond α-decaying nuclei. United States. doi:10.1103/PhysRevC.98.044307.
Såmark-Roth, A., Sarmiento, L. G., Rudolph, D., Ljungberg, J., Carlsson, B. G., Fahlander, C., Forsberg, U., Golubev, P., Ragnarsson, I., Ackermann, D., Andersson, L. -L., Block, M., Brand, H., Cox, D. M., Di Nitto, A., Düllmann, Ch. E., Eberhardt, K., Even, J., Gates, J. M., Gerl, J., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Jäger, E., Khuyagbaatar, J., Kindler, B., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Omtvedt, J. P., Papadakis, P., Runke, J., Rykaczewski, Krzysztof, Schädel, M., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Trautmann, N., Torres, T., Türler, A., Ward, A., Wiehl, N., and Yakushev, A. Tue . "Low-lying states in Ra219 and Rn215: Sampling microsecond α-decaying nuclei". United States. doi:10.1103/PhysRevC.98.044307. https://www.osti.gov/servlets/purl/1571859.
@article{osti_1571859,
title = {Low-lying states in Ra219 and Rn215: Sampling microsecond α-decaying nuclei},
author = {Såmark-Roth, A. and Sarmiento, L. G. and Rudolph, D. and Ljungberg, J. and Carlsson, B. G. and Fahlander, C. and Forsberg, U. and Golubev, P. and Ragnarsson, I. and Ackermann, D. and Andersson, L. -L. and Block, M. and Brand, H. and Cox, D. M. and Di Nitto, A. and Düllmann, Ch. E. and Eberhardt, K. and Even, J. and Gates, J. M. and Gerl, J. and Gregorich, K. E. and Gross, C. J. and Herzberg, R. -D. and Heßberger, F. P. and Jäger, E. and Khuyagbaatar, J. and Kindler, B. and Kojouharov, I. and Kratz, J. V. and Krier, J. and Kurz, N. and Lommel, B. and Mistry, A. and Mokry, C. and Omtvedt, J. P. and Papadakis, P. and Runke, J. and Rykaczewski, Krzysztof and Schädel, M. and Schaffner, H. and Schausten, B. and Thörle-Pospiech, P. and Trautmann, N. and Torres, T. and Türler, A. and Ward, A. and Wiehl, N. and Yakushev, A.},
abstractNote = {© 2018 American Physical Society. Short-lived α-decaying nuclei "northeast" of Pb208 in the chart of nuclides were studied using the reaction Ca48+Am243 with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even Ra220 and its odd-A neighbors, Fr219, and Ra221,219, with a focus on the Ra219→Rn215 decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of Ra219 is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.},
doi = {10.1103/PhysRevC.98.044307},
journal = {Physical Review C},
number = 4,
volume = 98,
place = {United States},
year = {2018},
month = {10}
}

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H.</span> </li> <li> Physics Letters B, Vol. 771</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.physletb.2017.03.074" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.physletb.2017.03.074<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/0168-9002(94)91652-7" target="_blank" rel="noopener noreferrer" class="name">Digital techniques for real-time pulse shaping in radiation measurements<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1994-12-01">December 1994</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Jordanov, Valentin T.; Knoll, Glenn F.; Huber, Alan C.</span> </li> <li> Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 353, Issue 1-3</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/0168-9002(94)91652-7" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/0168-9002(94)91652-7<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevC.96.014324" target="_blank" rel="noopener noreferrer" class="name"><math> <mi>α</mi> </math> -decay chain of the short-lived isotope <math> <mmultiscripts> <mi mathvariant="bold">Pa</mi> <mprescripts/> <none/> <mn>220</mn> </mmultiscripts> </math> established using a digital pulse processing technique<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2017-07-01">July 2017</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Huang, T. 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D.</span> </li> <li> Physical Review C, Vol. 96, Issue 1</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1103/PhysRevC.96.014324" class="text-muted" target="_blank" rel="noopener noreferrer">10.1103/PhysRevC.96.014324<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevC.74.044310" target="_blank" rel="noopener noreferrer" class="name">Many-particles–plus–rotor description of magnetic bands at high spin<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2006-10-01">October 2006</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Carlsson, B. 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A.; Chen, Y. S.</span> </li> <li> Physical Review C, Vol. 37, Issue 6</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1103/PhysRevC.37.2744" class="text-muted" target="_blank" rel="noopener noreferrer">10.1103/PhysRevC.37.2744<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRev.182.1329" target="_blank" rel="noopener noreferrer" class="name">Alpha Decay of <math display="inline"> <mrow> <mmultiscripts> <mrow> <mi mathvariant="normal">U</mi> </mrow> <mprescripts/> <mrow/> <mrow> <mn>227</mn> </mrow> <mrow/> <mrow/> </mmultiscripts> </mrow> </math><span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1969-06-01">June 1969</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Hahn, R. L.; Roche, M. F.; Toth, K. S.</span> </li> <li> Physical Review, Vol. 182, Issue 4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1103/PhysRev.182.1329" class="text-muted" target="_blank" rel="noopener noreferrer">10.1103/PhysRev.182.1329<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/S0168-9002(03)01368-8" target="_blank" rel="noopener noreferrer" class="name">Geant4—a simulation toolkit<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2003-07-01">July 2003</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Agostinelli, S.; Allison, J.; Amako, K.</span> </li> <li> Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/S0168-9002(03)01368-8" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/S0168-9002(03)01368-8<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/PhysRevLett.97.082501" target="_blank" rel="noopener noreferrer" class="name">Discovery of <math display="inline"> <mmultiscripts> <mi>Xe</mi> <mprescripts/> <none/> <mn>109</mn> </mmultiscripts> </math> and <math display="inline"> <mmultiscripts> <mi>Te</mi> <mprescripts/> <none/> <mn>105</mn> </mmultiscripts> </math> : Superallowed <math display="inline"> <mi>α</mi> </math> Decay near Doubly Magic <math display="inline"> <mmultiscripts> <mi>Sn</mi> <mprescripts/> <none/> <mn>100</mn> </mmultiscripts> </math><span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2006-08-01">August 2006</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Liddick, S. N.; Grzywacz, R.; Mazzocchi, C.</span> </li> <li> Physical Review Letters, Vol. 97, Issue 8</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1103/PhysRevLett.97.082501" class="text-muted" target="_blank" rel="noopener noreferrer">10.1103/PhysRevLett.97.082501<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.nima.2011.11.074" target="_blank" rel="noopener noreferrer" class="name">A Geant4 simulation package for the TASISpec experimental detector setup<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2012-03-01">March 2012</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Sarmiento, L. G.; Andersson, L. -L.; Rudolph, D.</span> </li> <li> Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 667</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.nima.2011.11.074" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.nima.2011.11.074<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1103/RevModPhys.68.349" target="_blank" rel="noopener noreferrer" class="name">Intrinsic reflection asymmetry in atomic nuclei<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1996-04-01">April 1996</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Butler, P. A.; Nazarewicz, W.</span> </li> <li> Reviews of Modern Physics, Vol. 68, Issue 2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1103/RevModPhys.68.349" class="text-muted" target="_blank" rel="noopener noreferrer">10.1103/RevModPhys.68.349<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <div class="pagination-container small"> <a class="pure-button prev page" href="#" rel="prev"><span class="fa fa-angle-left"></span></a><ul class="pagination d-inline-block" style="padding-left:.2em;"></ul><a class="pure-button next page" href="#" rel="next"><span class="fa fa-angle-right"></span></a> </div> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All References</a></li> <li class="small" style="margin-left:.75em; text-transform:capitalize;"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="journal"><span class="fa fa-angle-right"></span> journal<small class="text-muted"> (49)</small></a></li> </ul> <div style="margin-top:2em;"> <form class="pure-form small text-muted reference-search"> <label for="reference-search-text" class="sr-only">Search</label> <input class="search form-control pure-input-1" id="reference-search-text" placeholder="Search" style="margin-bottom:10px;" /> <fieldset> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="name" style="position:relative;top:2px;" id="reference-search-sort-name"><label for="reference-search-sort-name" style="margin-left: .3em;">Sort by title</label></div> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="date" data-order="desc" style="position:relative;top:2px;" id="reference-search-sort-date"><label for="reference-search-sort-date" style="margin-left: .3em;">Sort by date</label></div> </fieldset> <div class="text-left" style="margin-left:1em;"> <a href="" class="filter-clear clearfix" title="Clear filter / sort" style="font-weight:normal; float:none;">[ × clear filter / sort ]</a> </div> </form> </div> </div> </div> </section> <section id="biblio-related" class="tab-content tab-content-sec " data-tab="biblio"> <div class="row"> <div class="col-sm-9 order-sm-9"> <section id="biblio-similar" class="tab-content tab-content-sec active" data-tab="related"> <div class="padding"> <p class="lead text-muted" style="font-size: 18px; margin-top:0px;">Similar Records in DOE PAGES and OSTI.GOV collections:</p> <aside> <ul class="item-list" itemscope itemtype="http://schema.org/ItemList" style="padding-left:0; list-style-type: none;"> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="2" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1393336-decay-spectroscopy-element-daughters-rg280mt276-mt276bh272" itemprop="url">Decay spectroscopy of element 115 daughters: <math> <mrow> <mmultiscripts> <mi> Rg </mi><mprescripts/><none/> <mn> 280 </mn> </mmultiscripts> <mo> → </mo> <mmultiscripts> <mi> Mt </mi><mprescripts/><none/> <mn> 276 </mn> </mmultiscripts> </mrow> </math> and <math> <mrow> <mmultiscripts> <mi> Mt </mi><mprescripts/><none/> <mn> 276 </mn> </mmultiscripts> <mo> → </mo> <mmultiscripts> <mi> Bh </mi><mprescripts/><none/> <mn> 272 </mn> </mmultiscripts> </mrow> </math></a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Gates, J. M.</span> ; <span class="author">Gregorich, K. E.</span> ; <span class="author">Gothe, O. R.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review. C, Nuclear Physics</span> </span> </div> <div class="abstract">In this study, forty-six decay chains, assigned to the decay of <sup>288</sup>115, were produced using the <sup>243</sup>Am (<sup>48</sup>Ca, 3n) <sup>288</sup>115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be <sup>280</sup>Rg and <sup>276</sup>Mt, respectively). Upon combining these data with those from 22 <sup>288</sup>115 decay chains observed in a similar experiment, updated level schemes in <sup>276</sup>Mt and <sup>272</sup>Bh (populated by the α decay of <sup>280</sup>Rg and <sup>276</sup>Mt,<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> respectively) are proposed. Additionally, photons were observed in the energy range expected for K x rays coincident with the α decay of both <sup>280</sup>Rg and <sup>276</sup>Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 18<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1103/PhysRevC.92.021301" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1393336" data-product-type="Journal Article" data-product-subtype="AM" >10.1103/PhysRevC.92.021301</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1393336" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1393336" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="3" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1430686-decay-high-isomers-ds270-hs266-superfluid-tunneling-model" itemprop="url"><math> <mi> α </mi> </math> decay of high- <i>K</i> isomers in <math> <mmultiscripts> <mi> Ds </mi><mprescripts/><none/> <mn> 270 </mn> </mmultiscripts> </math> and <math> <mmultiscripts> <mi> Hs </mi><mprescripts/><none/> <mn> 266 </mn> </mmultiscripts> </math> in a superfluid tunneling model</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Clark, R. M.</span> ; <span class="author">Rudolph, D.</span> <span class="text-muted pubdata"> - Physical Review C</span> </span> </div> <div class="abstract">Here, we use the superfluid tunneling model (STM) to calculate the half-lives of ground-state α decays of even-even superheavy nuclei (SHN) with Z ≥ 100 . The experimental data are reproduced to accuracies comparable to other contemporary models of α decay of SHN. We apply the STM to the case of the α decaying high-K isomers identified in the decay chains of <sup>270</sup>Ds . By accounting for the α -decay Q values, Q<sub>α</sub>, the angular momentum difference between initial and final states, L, and a reduction in the pairing gap, Δ, we are able to reproduce the observed α decay<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> of the isomers, including the unusual competition between L ≈ 10 and L ≈ 0 α branches seen for the K isomer in <sup>270</sup>Ds ( Z = 110 ).</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 5<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1103/PhysRevC.97.024333" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1430686" data-product-type="Journal Article" data-product-subtype="AM" >10.1103/PhysRevC.97.024333</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1430686" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1430686" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="4" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/1339373-experiments-synthesis-superheavy-nuclei-fl284-fl285-pu239-reactions" itemprop="url">Experiments on the synthesis of superheavy nuclei <math> <mmultiscripts> <mi> Fl </mi><mprescripts/><none/> <mn> 284 </mn> </mmultiscripts> </math> and <math> <mmultiscripts> <mi> Fl </mi><mprescripts/><none/> <mn> 285 </mn> </mmultiscripts> </math> in the <math> <mrow> <mmultiscripts> <mi> Pu </mi><mprescripts/><none/> <mrow> <mn> 239 </mn> <mo> , </mo> <mn> 240 </mn> </mrow> </mmultiscripts> <mo> + </mo> <mmultiscripts> <mi> Ca </mi><mprescripts/><none/> <mn> 48 </mn> </mmultiscripts> </mrow> </math> reactions</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Utyonkov, V. K.</span> ; <span class="author">Brewer, N. T.</span> ; <span class="author">Oganessian, Yu. Ts.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review. C, Nuclear Physics</span> </span> </div> <div class="abstract">In this study, irradiations of <sup>239</sup>Pu and <sup>240</sup>Pu targets with <sup>48</sup>Ca beams aimed at the synthesis of Z = 114 flerovium isotopes were performed at the Dubna Gas Filled Recoil Separator. A new spontaneously fissioning (SF) isotope <sup>284</sup>Fl was produced for the first time in the <sup>240</sup>Pu + <sup>48</sup>Ca (250 MeV) and <sup>239</sup>Pu + <sup>48</sup>Ca (245 MeV) reactions. The cross section of the <sup>239</sup>Pu (<sup>48</sup>Ca , 3 n) <sup>284</sup>Fl reaction channel was about 20 times lower than predicted by theoretical models and about 50 times lower than the maximum fusion-evaporation cross section for the 3 n and 4 n channels<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> measured in the <sup>244</sup>Pu + <sup>48</sup>Ca reaction. In the <sup>240</sup>Pu + <sup>48</sup>Ca experiment, performed at 245 MeV in order to maximize the 3 n -evaporation channel, three decay chains of <sup>285</sup>Fl were detected. The α -decay energy of <sup>285</sup>Fl was measured for the first time and decay properties of its descendants <sup>281</sup>Cn , <sup>277</sup>Ds , <sup>273</sup>Hs , <sup>269</sup>Sg, and <sup>265</sup>Rf were determined with higher accuracy. The assignment of SF events observed during the irradiation of the <sup>240</sup>Pu target with a 250 MeV <sup>48</sup>Ca beam to <sup>284</sup>Fl decay is presented and discussed. The cross sections at both <sup>48</sup>Ca energies are similar and exceed that observed in the reaction with the lighter isotope <sup>239</sup>Pu by a factor of 10. Lastly, the decay properties of the synthesized nuclei and their production cross sections indicate a rapid decrease of stability of superheavy nuclei as the neutron number decreases from the predicted magic neutron number N = 184 .</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1103/PhysRevC.92.034609" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1339373" data-product-type="Journal Article" data-product-subtype="AC" >10.1103/PhysRevC.92.034609</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="5" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1493143-experiments-synthesis-superheavy-nuclei-fl284-fl285-pu239-reactions" itemprop="url">Experiments on the synthesis of superheavy nuclei <math> <mmultiscripts> <mi> Fl </mi><mprescripts/><none/> <mn> 284 </mn> </mmultiscripts> </math> and <math> <mmultiscripts> <mi> Fl </mi><mprescripts/><none/> <mn> 285 </mn> </mmultiscripts> </math> in the <math> <mrow> <mmultiscripts> <mi> Pu </mi><mprescripts/><none/> <mrow> <mn> 239 </mn> <mo> , </mo> <mn> 240 </mn> </mrow> </mmultiscripts> <mo> + </mo> <mmultiscripts> <mi> Ca </mi><mprescripts/><none/> <mn> 48 </mn> </mmultiscripts> </mrow> </math> reactions</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Utyonkov, Vladimir K.</span> ; <span class="author">Brewer, Nathan T.</span> ; <span class="author">Oganessian, Yuri Ts.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review. C, Nuclear Physics</span> </span> </div> <div class="abstract">Irradiations of <sup>239</sup>Pu and <sup>240</sup>Pu targets with 48Ca beams aimed at the synthesis of Z=114 flerovium isotopes were performed at the Dubna Gas Filled Recoil Separator. A new spontaneously fissioning (SF) isotope <sup>284</sup>Fl was produced for the first time in the <sup>240</sup>Pu+<sup>48</sup>Ca (250 MeV) and <sup>239</sup>Pu+<sup>48</sup>Ca (245 MeV) reactions. The cross section of the <sup>239</sup>Pu(<sup>48</sup>Ca,3n)<sup>284</sup>Fl reaction channel was about 20 times lower than predicted by theoretical models and about 50 times lower than the maximum fusion-evaporation cross section for the 3n and 4n channels measured in the <sup>244</sup>Pu+<sup>48</sup>Ca reaction. In the <sup>240</sup>Pu+<sup>48</sup>Ca experiment, performed at 245 MeV in order to<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> maximize the 3n-evaporation channel, three decay chains of <sup>285</sup>Fl were detected. The α-decay energy of <sup>285</sup>Fl was measured for the first time and decay properties of its descendants <sup>281</sup>Cn, <sup>277</sup>Ds, <sup>273</sup>Hs, <sup>269</sup>Sg, and <sup>265</sup>Rf were determined with higher accuracy. The assignment of SF events observed during the irradiation of the <sup>240</sup>Pu target with a 250 MeV <sup>48</sup>Ca beam to <sup>284</sup>Fl decay is presented and discussed. The cross sections at both <sup>48</sup>Ca energies are similar and exceed that observed in the reaction with the lighter isotope <sup>239</sup>Pu by a factor of 10. In conclusion, the decay properties of the synthesized nuclei and their production cross sections indicate a rapid decrease of stability of superheavy nuclei as the neutron number decreases from the predicted magic neutron number N = 184.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 30<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1103/PhysRevC.92.034609" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1493143" data-product-type="Journal Article" data-product-subtype="AM" >10.1103/PhysRevC.92.034609</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1493143" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1493143" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="6" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1379727-decay-si38-tz-+5-+6-low-lying-core-excited-states-odd-odd-p38-isotopes" itemprop="url"><math> <mi> β </mi> </math> decay of <math> <mmultiscripts> <mi mathvariant="bold"> Si </mi><mprescripts/><none/> <mrow> <mn> 38 </mn> <mo> , </mo> <mn> 40 </mn> </mrow> </mmultiscripts> </math> ( <math> <mrow> <msub> <mi> T </mi> <mi> z </mi> </msub> <mo> = </mo> <mo> + </mo> <mn> 5 </mn> <mo> , </mo> <mspace></mspace> <mo> + </mo> <mn> 6 </mn> </mrow> </math> ) to low-lying core excited states in odd-odd <math> <mmultiscripts> <mi mathvariant="bold"> P </mi><mprescripts/><none/> <mrow> <mn> 38 </mn> <mo> , </mo> <mn> 40 </mn> </mrow> </mmultiscripts> </math> isotopes</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Tripathi, Vandana</span> ; <span class="author">Lubna, R. S.</span> ; <span class="author">Abromeit, B.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Physical Review C</span> </span> </div> <div class="abstract">Low-lying excited states in P<sup>38,40</sup> have been identified in the β decay of T<sub>z</sub>=+5,+6, Si<sup>38,40</sup>. Based on the allowed nature of the Gamow-Teller (GT) decay observed, these states are assigned spin and parity of 1<sup>+</sup> and are core-excited 1p1h intruder states with a parity opposite to the ground state. The occurrence of intruder states at low energies highlights the importance of pairing and quadrupole correlation energies in lowering the intruder states despite the N=20 shell gap. Configuration interaction shell model calculations with the state-of-art SDPF-MU effective interaction were performed to understand the structure of these 1p1h states in the even-A<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> phosphorus isotopes. States in P<sup>40</sup> with N=25 were found to have very complex configurations involving all the fp orbitals leading to deformed states as seen in neutron-rich nuclei with N≈28. The calculated GT matrix elements for the β decay highlight the dominance of the decay of the core neutrons rather than the valence neutrons.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1103/PhysRevC.95.024308" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1379727" data-product-type="Journal Article" data-product-subtype="AM" >10.1103/PhysRevC.95.024308</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1379727" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1379727" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> </ul> </aside> </div> </section> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a class="tab-nav disabled" data-tab="related" style="color: #636c72 !important; opacity: 1;"><span class="fa fa-angle-right"></span> Similar Records</a></li> </ul> </div> </div> </section> </div></div> </div> </div> </section> <footer class="" style="background-color:#f9f9f9; /* padding-top: 0.5rem; */"> <div class="footer-minor"> <div class="container"> <hr class="footer-separator" /> <div class="text-center" style="margin-top:1.25rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list" id="footer-org-menu"> <li class="pure-menu-item"> <a href="https://energy.gov" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-us-doe-min" alt="U.S. Department of Energy" /> </a> </li> <li class="pure-menu-item"> <a href="https://www.energy.gov/science/office-science" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-office-of-science-min" alt="Office of Science" /> </a> </li> <li class="pure-menu-item"> <a href="/"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-osti-min" alt="Office of Scientific and Technical Information" /> </a> </li> </ul> </div> </div> <div class="text-center small" style="margin-top:0.5em;margin-bottom:2.0rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list"> <li class="pure-menu-item"><a href="/disclaim" class="pure-menu-link"><span class="fa fa-institution"></span> Website Policies <span class="hidden-xs">/ Important Links</span></a></li> <li class="pure-menu-item"><a href="/pages/contact" class="pure-menu-link"><span class="fa fa-comments-o"></span> Contact Us</a></li> <li class="d-block d-md-none"></li> <li class="pure-menu-item"><a href="https://www.facebook.com/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-facebook" style=""></span></a></li> <li class="pure-menu-item"><a href="https://twitter.com/OSTIgov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-twitter" style=""></span></a></li> <li class="pure-menu-item"><a href="https://www.youtube.com/user/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-youtube-play" style=""></span></a></li> </ul> </div> </div> </div> </div> </footer> <link href="/pages/css/pages.fonts.200912.1307.css" rel="stylesheet"> <script src="/pages/js/pages.200912.1307.js"></script><noscript></noscript> <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-MML-AM_CHTML' async> MathJax.Hub.Config({ tex2jax: {displayMath: [], inlineMath: [['$$','$$'], ['\\(','\\)']]}, asciimath2jax: {delimiters: []}, skipStartupTypeset: true, webFont: null, CommonHTML: { scale: 84, // mathjx wants to scale everything to 119% by default? mtextFontInherit: true } }); MathJax.Hub.Queue(["Typeset",MathJax.Hub,"item-list"]); MathJax.Hub.Queue(["Typeset",MathJax.Hub,"citation-pagetitle"]); MathJax.Hub.Queue(["Typeset",MathJax.Hub,"citation-abstract"]); </script><noscript></noscript> <script defer src="/pages/js/pages.biblio.200912.1307.js"></script><noscript></noscript> <script defer src="/pages/js/lity.js"></script><noscript></noscript> <script async type="text/javascript" src="/pages/js/Universal-Federated-Analytics-Min.js?agency=DOE" id="_fed_an_ua_tag"></script><noscript></noscript> </body> <!-- DOE PAGES v.200912.1307 --> </html>