A Detailed Study of Pre-scission γ Emission as a Probe of Nuclear Dissipation

A Detailed Study of Pre-scission γ Emission as a

Probe of Nuclear Dissipation

佚名

【期刊名称】《理论物理通讯（英文版）》 【年(卷),期】2007(048)010

【摘要】Using a Langev'm equation coupled with a statistical model, we calculate pre-scission giant dipole resonance (GDR) γ-ray multiplicity of nuclei l94Pb, 200Pb, 206Pb, and 200Os. It is demonstrated that with increasing the isospin asymmetry of these fissioning nuclei the sensitivity of the emitted γ multiplicity to the nuclear viscosity coefficient is decreased significantly. For 200Os nucleus, this γ-ray emission is no longer sensitive to the magnitude of the viscosity coefficient. In addition, the effect of the isospin asymmetry on the γ rays as a probe of nuclear dissipation is reduced with increasing angular momentum. These results suggest that to obtain a more accurate information of the viscosity coefficient by the measurement of pre-scission GDR γ-ray multiplicity it is better to choose those compound systems with small isospin asymmetry and low spin. 【总页数】3页(710-712)

【关键词】giant dipole resonance γ-ray multiplicity, nuclear dissipation, isospin asymmetry effect, Langevin equation 【作者】佚名