Decay spectroscopy of element 115 daughters: Rg280→Mt276 and Mt276→Bh272

Gates, J. M.; Gregorich, K. E.; Gothe, O. R.; Uribe, E. C.; Pang, G. K.; Bleuel, D. L.; Block, M.; Clark, R. M.; Campbell, C. M.; Crawford, H. L.; Cromaz, M.; Di Nitto, A.; Düllmann, Ch. E.; Esker, N. E.; Fahlander, C.; Fallon, P.; Farjadi, R. M.; Forsberg, U.; Khuyagbaatar, J.; Loveland, W.; Macchiavelli, A. O.; May, E. M.; Mudder, P. R.; Olive, D. T.; Rice, A. C.; Rissanen, J.; Rudolph, D.; Sarmiento, L. G.; Shusterman, J. A.; Stoyer, M. A.; Wiens, A.; Yakushev, A.; Nitsche, H.

doi:10.1103/PhysRevC.92.021301

Title: Decay spectroscopy of element 115 daughters: ${}^{280}{Rg} \to {}^{276}{Mt}$ and ${}^{276}{Mt} \to {}^{272}{Bh}$

Abstract

In this study, forty-six decay chains, assigned to the decay of ²⁸⁸115, were produced using the ²⁴³Am (⁴⁸Ca, 3n) ²⁸⁸115 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 ²⁸⁰Rg and ²⁷⁶Mt, respectively). Upon combining these data with those from 22 ²⁸⁸115 decay chains observed in a similar experiment, updated level schemes in ²⁷⁶Mt and ²⁷²Bh (populated by the α decay of ²⁸⁰Rg and ²⁷⁶Mt, respectively) are proposed. Additionally, photons were observed in the energy range expected for K x rays coincident with the α decay of both ²⁸⁰Rg and ²⁷⁶Mt. 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.

Authors:

Gates, J. M. ^[1]; Gregorich, K. E. ^[1]; Gothe, O. R. ^[2]; Uribe, E. C. ^[2]; Pang, G. K. ^[1]; Bleuel, D. L. ^[3]; Block, M. ^[4]; Clark, R. M. ^[1]; Campbell, C. M. ^[1]; Crawford, H. L. ^[1]; Cromaz, M. ^[1]; Di Nitto, A. ^[5]; Düllmann, Ch. E. ^[6]; Esker, N. E. ^[2]; Fahlander, C. ^[7]; Fallon, P. ^[1]; Farjadi, R. M. ^[1]; Forsberg, U. ^[7]; Khuyagbaatar, J. ^[8]; Loveland, W. ^[9] more »

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
GSI Helmholtzzentrum fur Schwerionenforschung GmbH (Germany)
Johannes Gutenberg-Universitat Mainz (Germany)
GSI Helmholtzzentrum fur Schwerionenforschung GmbH (Germany); Johannes Gutenberg-Universitat Mainz (Germany); Helmholtz Institute Mainz (Germany)
Lund Univ. (Sweden)
GSI Helmholtzzentrum fur Schwerionenforschung GmbH (Germany); Helmholtz Institute Mainz (Germany)
Oregon State Univ., Corvallis, OR (United States)

Publication Date:: Mon Aug 03 00:00:00 EDT 2015

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1393336

Alternate Identifier(s):: OSTI ID: 1208207

Report Number(s):: LLNL-JRNL-737626
Journal ID: ISSN 0556-2813; PRVCAN

Grant/Contract Number:: AC52-07NA27344; AC02-05CH11231; FG06-97ER41026

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C, Nuclear Physics

Additional Journal Information:: Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Gates, J. M., Gregorich, K. E., Gothe, O. R., Uribe, E. C., Pang, G. K., Bleuel, D. L., Block, M., Clark, R. M., Campbell, C. M., Crawford, H. L., Cromaz, M., Di Nitto, A., Düllmann, Ch. E., Esker, N. E., Fahlander, C., Fallon, P., Farjadi, R. M., Forsberg, U., Khuyagbaatar, J., Loveland, W., Macchiavelli, A. O., May, E. M., Mudder, P. R., Olive, D. T., Rice, A. C., Rissanen, J., Rudolph, D., Sarmiento, L. G., Shusterman, J. A., Stoyer, M. A., Wiens, A., Yakushev, A., and Nitsche, H. Decay spectroscopy of element 115 daughters: Rg280→Mt276 and Mt276→Bh272.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevC.92.021301.

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                    Gates, J. M., Gregorich, K. E., Gothe, O. R., Uribe, E. C., Pang, G. K., Bleuel, D. L., Block, M., Clark, R. M., Campbell, C. M., Crawford, H. L., Cromaz, M., Di Nitto, A., Düllmann, Ch. E., Esker, N. E., Fahlander, C., Fallon, P., Farjadi, R. M., Forsberg, U., Khuyagbaatar, J., Loveland, W., Macchiavelli, A. O., May, E. M., Mudder, P. R., Olive, D. T., Rice, A. C., Rissanen, J., Rudolph, D., Sarmiento, L. G., Shusterman, J. A., Stoyer, M. A., Wiens, A., Yakushev, A., & Nitsche, H. Decay spectroscopy of element 115 daughters: Rg280→Mt276 and Mt276→Bh272.  United States.  https://doi.org/10.1103/PhysRevC.92.021301

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                    Gates, J. M., Gregorich, K. E., Gothe, O. R., Uribe, E. C., Pang, G. K., Bleuel, D. L., Block, M., Clark, R. M., Campbell, C. M., Crawford, H. L., Cromaz, M., Di Nitto, A., Düllmann, Ch. E., Esker, N. E., Fahlander, C., Fallon, P., Farjadi, R. M., Forsberg, U., Khuyagbaatar, J., Loveland, W., Macchiavelli, A. O., May, E. M., Mudder, P. R., Olive, D. T., Rice, A. C., Rissanen, J., Rudolph, D., Sarmiento, L. G., Shusterman, J. A., Stoyer, M. A., Wiens, A., Yakushev, A., and Nitsche, H. Mon .  
"Decay spectroscopy of element 115 daughters: Rg280→Mt276 and Mt276→Bh272".  United States.  https://doi.org/10.1103/PhysRevC.92.021301.  https://www.osti.gov/servlets/purl/1393336.

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@article{osti_1393336,

  title        = {Decay spectroscopy of element 115 daughters: Rg280→Mt276 and Mt276→Bh272},

  author       = {Gates, J. M. and Gregorich, K. E. and Gothe, O. R. and Uribe, E. C. and Pang, G. K. and Bleuel, D. L. and Block, M. and Clark, R. M. and Campbell, C. M. and Crawford, H. L. and Cromaz, M. and Di Nitto, A. and Düllmann, Ch. E. and Esker, N. E. and Fahlander, C. and Fallon, P. and Farjadi, R. M. and Forsberg, U. and Khuyagbaatar, J. and Loveland, W. and Macchiavelli, A. O. and May, E. M. and Mudder, P. R. and Olive, D. T. and Rice, A. C. and Rissanen, J. and Rudolph, D. and Sarmiento, L. G. and Shusterman, J. A. and Stoyer, M. A. and Wiens, A. and Yakushev, A. and Nitsche, H.},

  abstractNote = {In this study, forty-six decay chains, assigned to the decay of 288115, were produced using the 243Am (48Ca, 3n) 288115 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 280Rg and 276Mt, respectively). Upon combining these data with those from 22 288115 decay chains observed in a similar experiment, updated level schemes in 276Mt and 272Bh (populated by the α decay of 280Rg and 276Mt, respectively) are proposed. Additionally, photons were observed in the energy range expected for K x rays coincident with the α decay of both 280Rg and 276Mt. 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.},

  doi          = {10.1103/PhysRevC.92.021301},

  journal      = {Physical Review C, Nuclear Physics},

  number       = 2,

  volume       = 92,

  place        = {United States},

  year         = {Mon Aug 03 00:00:00 EDT 2015},

  month        = {Mon Aug 03 00:00:00 EDT 2015}

}

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Works referencing / citing this record:

Perspectives of Super-Heavy Nuclei research with the upcoming separator-spectrometer setup S ³ at GANIL/SPIRAL2 - The VAMOS Gas-Filled separator and AGATA
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Title: Decay spectroscopy of element 115 daughters: Rg 280 → Mt 276 and Mt 276 → Bh 272

Abstract

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Title: Decay spectroscopy of element 115 daughters: ${}^{280}{Rg} \to {}^{276}{Mt}$ and ${}^{276}{Mt} \to {}^{272}{Bh}$

Spectroscopy of Element 115 Decay Chains
journal, September 2013

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains
journal, January 2014

Evaluation of theoretical conversion coefficients using BrIcc
journal, May 2008

Synthesis of a New Element with Atomic Number $Z = 117$
journal, April 2010

New Superheavy Element Isotopes: ${}^{242}{Pu} ({}^{48}{Ca}, 5 n) {}^{285}1 14$
journal, October 2010

Microscopic mechanism of charged-particle radioactivity and generalization of the Geiger-Nuttall law
journal, October 2009

The reaction 48Ca + 248Cm → 296116* studied at the GSI-SHIP
journal, May 2012

In-beam and decay spectroscopy of transfermium nuclei
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Indication for a volatile element 114
journal, January 2010

Heaviest nuclei from ⁴⁸ Ca-induced reactions
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