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

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

    Corresponding author: YE Wei,
  • Department of Physics, Southeast University, Nanjing 210096, China

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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