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Title: Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction

Abstract

Here, we present new results from investigations of the 240Pu + 48Ca reaction at a projectile energy of 250 MeV. Three new decay chains of 285Fl were detected with decay properties mostly consistent with those measured in earlier studies. An additional chain was observed where the nuclei may decay through energy levels different from those of the other six chains registered so far. The cross section of the 240Pu( 48Ca,3n) 285Fl reaction was measured to be 0.58 +0.60 –0.33 pb, which is a factor of about 4–5 lower than that measured in the previous experiment at 245 MeV beam energy, consistent with expectations. The origin of an additional chain consisting of a recoil, α particle, and fission event is analyzed. The assignment of 25 short-lived SF events observed in this experiment is also discussed.

Authors:
 [1];  [2];  [1]; ORCiD logo [2];  [1];  [1]; ORCiD logo [3];  [1];  [4];  [1]; ORCiD logo [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1] more »;  [1];  [1];  [1];  [5];  [1];  [6];  [7];  [8];  [8];  [8] « less
  1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw, Warsaw (Poland)
  5. Vanderbilt Univ., Nashville, TN (United States)
  6. Joint Institute for Nuclear Research, Dubna (Russian Federation); Palacky Univ., Olomouc (Czech Republic)
  7. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. Chinese Academy of Sciences, Lanzhou (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1492172
Alternate Identifier(s):
OSTI ID: 1418710
Grant/Contract Number:  
AC05-00OR22725; 08-ERD-030; AC52-07NA27344; FG05-88ER40407
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 1; 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

Utyonkov, V. K., Brewer, Nathan T., Oganessian, Yu. Ts., Rykaczewski, Krzysztof P., Abdullin, F. Sh., Dmitriev, S. N., Grzywacz, Robert Kazimierz, Itkis, M. G., Miernik, Krzysztof, Polyakov, A. N., Roberto, James B., Sagaidak, R. N., Shirokovsky, I. V., Shumeiko, M. V., Tsyganov, Yu. S., Voinov, A. A., Subbotin, V. G., Sukhov, A. M., Karpov, A. V., Popeko, A. G., Sabel'nikov, A. V., Svirikhin, A. I., Vostokin, G. K., Hamilton, J. H., Kovrizhnykh, N. D., Schlattauer, L., Stoyer, M. A., Gan, Z., Huang, W. X., and Ma, L. Neutron-deficient superheavy nuclei obtained in the Pu240+Ca48 reaction. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.014320.
Utyonkov, V. K., Brewer, Nathan T., Oganessian, Yu. Ts., Rykaczewski, Krzysztof P., Abdullin, F. Sh., Dmitriev, S. N., Grzywacz, Robert Kazimierz, Itkis, M. G., Miernik, Krzysztof, Polyakov, A. N., Roberto, James B., Sagaidak, R. N., Shirokovsky, I. V., Shumeiko, M. V., Tsyganov, Yu. S., Voinov, A. A., Subbotin, V. G., Sukhov, A. M., Karpov, A. V., Popeko, A. G., Sabel'nikov, A. V., Svirikhin, A. I., Vostokin, G. K., Hamilton, J. H., Kovrizhnykh, N. D., Schlattauer, L., Stoyer, M. A., Gan, Z., Huang, W. X., & Ma, L. Neutron-deficient superheavy nuclei obtained in the Pu240+Ca48 reaction. United States. doi:10.1103/PhysRevC.97.014320.
Utyonkov, V. K., Brewer, Nathan T., Oganessian, Yu. Ts., Rykaczewski, Krzysztof P., Abdullin, F. Sh., Dmitriev, S. N., Grzywacz, Robert Kazimierz, Itkis, M. G., Miernik, Krzysztof, Polyakov, A. N., Roberto, James B., Sagaidak, R. N., Shirokovsky, I. V., Shumeiko, M. V., Tsyganov, Yu. S., Voinov, A. A., Subbotin, V. G., Sukhov, A. M., Karpov, A. V., Popeko, A. G., Sabel'nikov, A. V., Svirikhin, A. I., Vostokin, G. K., Hamilton, J. H., Kovrizhnykh, N. D., Schlattauer, L., Stoyer, M. A., Gan, Z., Huang, W. X., and Ma, L. Tue . "Neutron-deficient superheavy nuclei obtained in the Pu240+Ca48 reaction". United States. doi:10.1103/PhysRevC.97.014320. https://www.osti.gov/servlets/purl/1492172.
@article{osti_1492172,
title = {Neutron-deficient superheavy nuclei obtained in the Pu240+Ca48 reaction},
author = {Utyonkov, V. K. and Brewer, Nathan T. and Oganessian, Yu. Ts. and Rykaczewski, Krzysztof P. and Abdullin, F. Sh. and Dmitriev, S. N. and Grzywacz, Robert Kazimierz and Itkis, M. G. and Miernik, Krzysztof and Polyakov, A. N. and Roberto, James B. and Sagaidak, R. N. and Shirokovsky, I. V. and Shumeiko, M. V. and Tsyganov, Yu. S. and Voinov, A. A. and Subbotin, V. G. and Sukhov, A. M. and Karpov, A. V. and Popeko, A. G. and Sabel'nikov, A. V. and Svirikhin, A. I. and Vostokin, G. K. and Hamilton, J. H. and Kovrizhnykh, N. D. and Schlattauer, L. and Stoyer, M. A. and Gan, Z. and Huang, W. X. and Ma, L.},
abstractNote = {Here, we present new results from investigations of the 240Pu + 48Ca reaction at a projectile energy of 250 MeV. Three new decay chains of 285Fl were detected with decay properties mostly consistent with those measured in earlier studies. An additional chain was observed where the nuclei may decay through energy levels different from those of the other six chains registered so far. The cross section of the 240Pu(48Ca,3n)285Fl reaction was measured to be 0.58+0.60–0.33 pb, which is a factor of about 4–5 lower than that measured in the previous experiment at 245 MeV beam energy, consistent with expectations. The origin of an additional chain consisting of a recoil, α particle, and fission event is analyzed. The assignment of 25 short-lived SF events observed in this experiment is also discussed.},
doi = {10.1103/PhysRevC.97.014320},
journal = {Physical Review C},
number = 1,
volume = 97,
place = {United States},
year = {2018},
month = {1}
}

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Works referenced in this record:

Nuclear Ground-State Masses and Deformations
journal, March 1995

  • Moller, P.; Nix, J. R.; Myers, W. D.
  • Atomic Data and Nuclear Data Tables, Vol. 59, Issue 2, p. 185-381
  • DOI: 10.1006/adnd.1995.1002