Surveying post-saddle nuclear dissipation with protons and α particles as probes

YE Wei

doi:10.1088/1674-1137/34/1/008

Chinese Physics C> 2010, Vol. 34> Issue(1) : 45-48 DOI: 10.1088/1674-1137/34/1/008

Surveying post-saddle nuclear dissipation with protons and α particles as probes

YE Wei ^,

Department of Physics, Southeast University, Nanjing 210096, China

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Using a Langevin model, we calculate post-saddle proton and α-particle multiplicities as a function of the post-saddle dissipation strength (β) for the heavy systems ²³⁴Cf, ²⁴⁰Cf, ²⁴⁶Cf and ²⁴⁰U. We find that, with increasing isospin of the system, the sensitivity of post-saddle light charged-particle multiplicities to β decreases considerably and, moreover, for ²⁴⁰U the charged-particle multiplicities are no longer sensitive to β. These results suggest that in order to determine the post-saddle friction strength more accurately by measuring the multiplicities of pre-scission protons and α particles, it is best to populate those heavy compound systems with low isospin.

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YE Wei. Surveying post-saddle nuclear dissipation with protons and α particles as probes[J]. Chinese Physics C, 2010, 34(1): 45-48. doi: 10.1088/1674-1137/34/1/008

YE Wei. Surveying post-saddle nuclear dissipation with protons and α particles as probes[J]. Chinese Physics C, 2010, 34(1): 45-48. doi: 10.1088/1674-1137/34/1/008 shu

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Received: 2009-02-16
Revised: 2009-04-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Surveying post-saddle nuclear dissipation with protons and α particles as probes

Corresponding author: YE Wei,

Department of Physics, Southeast University, Nanjing 210096, China

Received Date: 2009-02-16

Accepted Date: 2009-04-01

Available Online: 2010-01-05

Abstract:

Using a Langevin model, we calculate post-saddle proton and α-particle multiplicities as a function of the post-saddle dissipation strength (β) for the heavy systems ²³⁴Cf, ²⁴⁰Cf, ²⁴⁶Cf and ²⁴⁰U. We find that, with increasing isospin of the system, the sensitivity of post-saddle light charged-particle multiplicities to β decreases considerably and, moreover, for ²⁴⁰U the charged-particle multiplicities are no longer sensitive to β. These results suggest that in order to determine the post-saddle friction strength more accurately by measuring the multiplicities of pre-scission protons and α particles, it is best to populate those heavy compound systems with low isospin.

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Surveying post-saddle nuclear dissipation with protons and α particles as probes

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