Isospin dependence of nuclear multifragmentation in statistical model

ZHANG Lei; XIE Dong-Zhu; ZHANG Yan-Ping; GAO Yuan

doi:10.1088/1674-1137/35/6/011

Chinese Physics C> 2011, Vol. 35> Issue(6) : 567-571 DOI: 10.1088/1674-1137/35/6/011

Isospin dependence of nuclear multifragmentation in statistical model

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Abstract：
The evolution of nuclear disintegration mechanisms with increasing excitation energy, from compound nucleus to multifragmentation, has been studied by using the Statistical Multifragmentation Model (SMM) within a micro-canonical ensemble. We discuss the observable characteristics as functions of excitation energy in multifragmentation, concentrating on the isospin dependence of the model in its decaying mechanism and break-up fragment configuration by comparing the A₀=200, Z₀=78 and A₀=200, Z₀=100 systems. The calculations indicate that the neutron-rich system (Z₀=78) translates to a fission-like process from evaporation later than the symmetric nucleus at a lower excitation energy, but gets a larger average multiplicity as the excitation energy increases above 1.0 MeV/u.

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ZHANG Lei, XIE Dong-Zhu, ZHANG Yan-Ping and GAO Yuan. Isospin dependence of nuclear multifragmentation in statistical model[J]. Chinese Physics C, 2011, 35(6): 567-571. doi: 10.1088/1674-1137/35/6/011

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Received: 2010-10-25
Revised: 2010-11-08

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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

Isospin dependence of nuclear multifragmentation in statistical model

Received Date: 2010-10-25

Accepted Date: 2010-11-08

Available Online: 2011-06-05

Abstract: The evolution of nuclear disintegration mechanisms with increasing excitation energy, from compound nucleus to multifragmentation, has been studied by using the Statistical Multifragmentation Model (SMM) within a micro-canonical ensemble. We discuss the observable characteristics as functions of excitation energy in multifragmentation, concentrating on the isospin dependence of the model in its decaying mechanism and break-up fragment configuration by comparing the A₀=200, Z₀=78 and A₀=200, Z₀=100 systems. The calculations indicate that the neutron-rich system (Z₀=78) translates to a fission-like process from evaporation later than the symmetric nucleus at a lower excitation energy, but gets a larger average multiplicity as the excitation energy increases above 1.0 MeV/u.

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Isospin dependence of nuclear multifragmentation in statistical model

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