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Calculated fission-fragment mass yields and average total kinetic energies of heavy and superheavy nuclei

Albertsson, Martin LU ; Carlsson, B. Gillis LU ; Døssing, Thomas LU ; Möller, Peter LU ; Randrup, Jørgen LU and Åberg, Sven LU (2020) In European Physical Journal A 56(2).
Abstract

Fission-fragment mass and total-kinetic-energy (TKE) distributions following fission of even-even nuclides in the region 74 ≤ Z≤ 126 and 92 ≤ N≤ 230 , comprising 896 nuclides have been calculated using the Brownian shape-motion method. The emphasis is the region of superheavy nuclei. To show compatibility with earlier results the calculations are extended to include earlier studied regions. An island of asymmetric fission is obtained in the superheavy region, 106 ≤ Z≤ 114 and 162 ≤ N≤ 176 , where the heavy fragment is found to be close to 208Pb and the light fragment adjusts accordingly. Most experimentally observed α-decay chains of superheavy nuclei with Z> 113 terminate by spontaneous fission in our predicted region of... (More)

Fission-fragment mass and total-kinetic-energy (TKE) distributions following fission of even-even nuclides in the region 74 ≤ Z≤ 126 and 92 ≤ N≤ 230 , comprising 896 nuclides have been calculated using the Brownian shape-motion method. The emphasis is the region of superheavy nuclei. To show compatibility with earlier results the calculations are extended to include earlier studied regions. An island of asymmetric fission is obtained in the superheavy region, 106 ≤ Z≤ 114 and 162 ≤ N≤ 176 , where the heavy fragment is found to be close to 208Pb and the light fragment adjusts accordingly. Most experimentally observed α-decay chains of superheavy nuclei with Z> 113 terminate by spontaneous fission in our predicted region of asymmetric fission. In these cases, the pronounced large asymmetry is accompanied by a low TKE value compatible with measurements.

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organization
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type
Contribution to journal
publication status
published
subject
in
European Physical Journal A
volume
56
issue
2
article number
46
publisher
Springer
external identifiers
  • scopus:85079064132
ISSN
1434-6001
DOI
10.1140/epja/s10050-020-00036-9
language
English
LU publication?
yes
id
d121aa75-ec10-46aa-ab7a-8571c0f11aa4
date added to LUP
2021-01-07 10:58:19
date last changed
2021-01-07 10:58:19
@article{d121aa75-ec10-46aa-ab7a-8571c0f11aa4,
  abstract     = {<p>Fission-fragment mass and total-kinetic-energy (TKE) distributions following fission of even-even nuclides in the region 74 ≤ Z≤ 126 and 92 ≤ N≤ 230 , comprising 896 nuclides have been calculated using the Brownian shape-motion method. The emphasis is the region of superheavy nuclei. To show compatibility with earlier results the calculations are extended to include earlier studied regions. An island of asymmetric fission is obtained in the superheavy region, 106 ≤ Z≤ 114 and 162 ≤ N≤ 176 , where the heavy fragment is found to be close to <sup>208</sup>Pb and the light fragment adjusts accordingly. Most experimentally observed α-decay chains of superheavy nuclei with Z&gt; 113 terminate by spontaneous fission in our predicted region of asymmetric fission. In these cases, the pronounced large asymmetry is accompanied by a low TKE value compatible with measurements.</p>},
  author       = {Albertsson, Martin and Carlsson, B. Gillis and Døssing, Thomas and Möller, Peter and Randrup, Jørgen and Åberg, Sven},
  issn         = {1434-6001},
  language     = {eng},
  number       = {2},
  publisher    = {Springer},
  series       = {European Physical Journal A},
  title        = {Calculated fission-fragment mass yields and average total kinetic energies of heavy and superheavy nuclei},
  url          = {http://dx.doi.org/10.1140/epja/s10050-020-00036-9},
  doi          = {10.1140/epja/s10050-020-00036-9},
  volume       = {56},
  year         = {2020},
}