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Volume 34 Issue 3
Jul.  2017
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TIAN Jian, YE Wei. Influence of Isospin on Fission Cross Section as a Probe of Presaddle Nuclear Dissipation[J]. Nuclear Physics Review, 2017, 34(3): 529-533. DOI: 10.11804/NuclPhysRev.34.03.529
Citation: TIAN Jian, YE Wei. Influence of Isospin on Fission Cross Section as a Probe of Presaddle Nuclear Dissipation[J]. Nuclear Physics Review, 2017, 34(3): 529-533. DOI: 10.11804/NuclPhysRev.34.03.529
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Influence of Isospin on Fission Cross Section as a Probe of Presaddle Nuclear Dissipation

  • Department of Physics, Southeast University, Nanjing 210096, China

Funds: National Natural Science Foundation of China (11575044)
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    10.11804/NuclPhysRev.34.03.529

  • Received Date: December 06, 2016
  • Revised Date: March 29, 2017
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    • Abstract
  • Langevin models that are coupled with particle emission are applied to calculate the drop of fission cross section caused by friction over its standard statistical-model value, σfdrop, as a function of excitation energy for three Bi nuclei with different isospins. We find that σfdrop become larger for 209Bi than for 202Bi and 195Bi, indicating a greater sensitivity of fission cross section to friction for high-isospin 209Bi. These results suggest that, to more accurately determine the presaddle dissipation strength by measuring fission excitation functions, it is best to populate those compound systems with a high isospin. Furthermore, we analyze the data of fission excitation functions measured in p + 209Bi and p + 208Pb reactions, which yield high-isospin 210Po and 209Bi systems, and extract a presaddle friction strength of (3-5)×1021 s-1 by comparing Langevin simulations with these experimental data.
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