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Title: Remarks on the fission barriers of super-heavy nuclei

Abstract

Shell-correction energies of super-heavy nuclei are approximated by using QαQα values of measured decay chains. Five decay chains were analyzed, which start at the isotopes 285Fl, 294118, 291Lv, 292Lv and 293Lv. The data are compared with predictions of macroscopic-microscopic models. Fission barriers are estimated that can be used to eliminate uncertainties in partial fission half-lives and in calculations of evaporation-residue cross-sections. In that calculations, fission probability of the compound nucleus is a major factor contributing to the total cross-section. The data also provide constraints on the cross-sections of capture and quasi-fission in the entrance channel of the fusion reaction. Here, arguments are presented that fusion reactions for synthesis of isotopes of elements 118 and 120 may have higher cross-sections than assumed so far.

Authors:
 [1];  [2];  [2];  [2];  [2];  [3];  [2];  [2];  [4];  [5];  [6];  [7];  [7];  [2];  [2];  [2];  [2];  [8];  [9];  [7] more »;  [10];  [11];  [12];  [13];  [2];  [13];  [2];  [7];  [7];  [4];  [2];  [4];  [14];  [12] « less
  1. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Goethe Univ., Frankfurt (Germany). Institut fur Physik
  2. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  3. Comenius Univ., Bratislava (Slovakia). Dept. of Nuclear Physics and Biophysics
  4. Johannes Gutenberg Univ., Mainz (Germany)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  6. Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy
  7. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw (Poland)
  9. Univ. of Tennessee, Knoxville, TN (United States)
  10. RIKEN, Saitama (Japan). Nishina Center for Accelerator-Based Science
  11. Japan Atomic Energy Agency (JAEA), Tokai (Japan)
  12. Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
  13. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  14. Univ. of Jyvaskyla (Finland). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1482453
Alternate Identifier(s):
OSTI ID: 1410057
Report Number(s):
LLNL-JRNL-668657
Journal ID: ISSN 1434-6001
Grant/Contract Number:  
AC52-07NA27344; 1/0576/13; APVV-0105-10; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Volume: 52; Journal Issue: 4; Journal ID: ISSN 1434-6001
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Hofmann, S., Heinz, S., Mann, R., Maurer, J., Münzenberg, G., Antalic, S., Barth, W., Dahl, L., Eberhardt, K., Grzywacz, R., Hamilton, J. H., Henderson, R. A., Kenneally, J. M., Kindler, B., Kojouharov, I., Lang, R., Lommel, B., Miernik, K., Miller, D., Moody, K. J., Morita, K., Nishio, K., Popeko, A. G., Roberto, J. B., Runke, J., Rykaczewski, K. P., Scheidenberger, C., Shaughnessy, D. A., Stoyer, M. A., Thörle-Pospiech, P., Tinschert, K., Trautmann, N., Uusitalo, J., and Yeremin, A. V. Remarks on the fission barriers of super-heavy nuclei. United States: N. p., 2016. Web. doi:10.1140/epja/i2016-16116-0.
Hofmann, S., Heinz, S., Mann, R., Maurer, J., Münzenberg, G., Antalic, S., Barth, W., Dahl, L., Eberhardt, K., Grzywacz, R., Hamilton, J. H., Henderson, R. A., Kenneally, J. M., Kindler, B., Kojouharov, I., Lang, R., Lommel, B., Miernik, K., Miller, D., Moody, K. J., Morita, K., Nishio, K., Popeko, A. G., Roberto, J. B., Runke, J., Rykaczewski, K. P., Scheidenberger, C., Shaughnessy, D. A., Stoyer, M. A., Thörle-Pospiech, P., Tinschert, K., Trautmann, N., Uusitalo, J., & Yeremin, A. V. Remarks on the fission barriers of super-heavy nuclei. United States. doi:10.1140/epja/i2016-16116-0.
Hofmann, S., Heinz, S., Mann, R., Maurer, J., Münzenberg, G., Antalic, S., Barth, W., Dahl, L., Eberhardt, K., Grzywacz, R., Hamilton, J. H., Henderson, R. A., Kenneally, J. M., Kindler, B., Kojouharov, I., Lang, R., Lommel, B., Miernik, K., Miller, D., Moody, K. J., Morita, K., Nishio, K., Popeko, A. G., Roberto, J. B., Runke, J., Rykaczewski, K. P., Scheidenberger, C., Shaughnessy, D. A., Stoyer, M. A., Thörle-Pospiech, P., Tinschert, K., Trautmann, N., Uusitalo, J., and Yeremin, A. V. Wed . "Remarks on the fission barriers of super-heavy nuclei". United States. doi:10.1140/epja/i2016-16116-0. https://www.osti.gov/servlets/purl/1482453.
@article{osti_1482453,
title = {Remarks on the fission barriers of super-heavy nuclei},
author = {Hofmann, S. and Heinz, S. and Mann, R. and Maurer, J. and Münzenberg, G. and Antalic, S. and Barth, W. and Dahl, L. and Eberhardt, K. and Grzywacz, R. and Hamilton, J. H. and Henderson, R. A. and Kenneally, J. M. and Kindler, B. and Kojouharov, I. and Lang, R. and Lommel, B. and Miernik, K. and Miller, D. and Moody, K. J. and Morita, K. and Nishio, K. and Popeko, A. G. and Roberto, J. B. and Runke, J. and Rykaczewski, K. P. and Scheidenberger, C. and Shaughnessy, D. A. and Stoyer, M. A. and Thörle-Pospiech, P. and Tinschert, K. and Trautmann, N. and Uusitalo, J. and Yeremin, A. V.},
abstractNote = {Shell-correction energies of super-heavy nuclei are approximated by using QαQα values of measured decay chains. Five decay chains were analyzed, which start at the isotopes 285Fl, 294118, 291Lv, 292Lv and 293Lv. The data are compared with predictions of macroscopic-microscopic models. Fission barriers are estimated that can be used to eliminate uncertainties in partial fission half-lives and in calculations of evaporation-residue cross-sections. In that calculations, fission probability of the compound nucleus is a major factor contributing to the total cross-section. The data also provide constraints on the cross-sections of capture and quasi-fission in the entrance channel of the fusion reaction. Here, arguments are presented that fusion reactions for synthesis of isotopes of elements 118 and 120 may have higher cross-sections than assumed so far.},
doi = {10.1140/epja/i2016-16116-0},
journal = {European Physical Journal. A},
number = 4,
volume = 52,
place = {United States},
year = {2016},
month = {4}
}

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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