Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section

YE Wei; TIAN Jian

doi:10.11804/NuclPhysRev.32.02.180

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Volume 32 Issue 2

Jun. 2015

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YE Wei, TIAN Jian. Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section[J]. Nuclear Physics Review, 2015, 32(2): 180-183. doi: 10.11804/NuclPhysRev.32.02.180

Citation:

YE Wei, TIAN Jian. Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section[J]. Nuclear Physics Review, 2015, 32(2): 180-183. doi: 10.11804/NuclPhysRev.32.02.180

Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section

doi: 10.11804/NuclPhysRev.32.02.180

YE Wei,
TIAN Jian

Department of Physics, Southeast University, Nanjing 210096, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-06-20

Abstract

Using the Langevin model, we study the effect of angular momentum on the drop of fission cross sections caused by friction over its standard statistical-model value, σdrop
f, as a function of presaddle friction strength β. It is found that friction effects on σdrop
f are substantially enhanced at low spin. In addition, by investigating the evolution of σdrop f with β for 195Bi, 201Bi and 207Bi nuclei, we find that friction effects become greater with increasing the neutron-to-proton ratio (N/Z) of Bi nucleus. These results suggest that on the experimental side, to precisely probe presaddle dissipation by measuring fission excitation functions, it is best to yield excited nuclear systems with a small spin and a large N/Z.
- angular momentum,
- nuclear dissipation,
- fission cross section,
- stochastic model
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沈阳化工大学材料科学与工程学院沈阳 110142

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Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section

doi: 10.11804/NuclPhysRev.32.02.180

YE Wei,
TIAN Jian

Department of Physics, Southeast University, Nanjing 210096, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-06-20

Key words:

Abstract: Using the Langevin model, we study the effect of angular momentum on the drop of fission cross sections caused by friction over its standard statistical-model value, σdrop
f, as a function of presaddle friction strength β. It is found that friction effects on σdrop
f are substantially enhanced at low spin. In addition, by investigating the evolution of σdrop f with β for 195Bi, 201Bi and 207Bi nuclei, we find that friction effects become greater with increasing the neutron-to-proton ratio (N/Z) of Bi nucleus. These results suggest that on the experimental side, to precisely probe presaddle dissipation by measuring fission excitation functions, it is best to yield excited nuclear systems with a small spin and a large N/Z.

YE Wei, TIAN Jian. Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section[J]. Nuclear Physics Review, 2015, 32(2): 180-183. doi: 10.11804/NuclPhysRev.32.02.180

Citation:

YE Wei, TIAN Jian. Angular Momentum Effect on Probing Nuclear Dissipation with Fission Cross Section[J]. Nuclear Physics Review, 2015, 32(2): 180-183. doi: 10.11804/NuclPhysRev.32.02.180