30MeV/u^(40)Ar+^(115)In反应中的IMF能谱

Energy Spectra of Intermediate Mass Fragments Emitted in 30 MeV/u^(40)Ar+^(115)In Reaction

测量了 3 0MeV/u40 Ar束流轰击115 In反应靶时出射的中等质量碎片(IMF)的能谱 .通过比较在不同出射角度发射的同一种IMF的能谱 ,得到了IMF的发射机制随出射角的演化关系 .在假定运动源速度和出射离子库仑位垒不随出射角变化的条件下 ,通过改变发射源的强度和核温度参量完成了对实验测得能谱的运动源拟合 ,并详细讨论了 3个发射源所占份额和源强随出射角的演化关系 .

The energy spectra of intermediate mass fragments (IMF) emitted in 30 MeV/u 40 Ar+ 115 In reaction has been measured. After analyzed the energy spectra of the same kind of IMF emitted at different angles,the dependence of emission mechanism of IMF on the emission angles has been obtained. Assumed that the speed of the moving sources and the Coulomb energies do not change with the emission angles,the moving sources fitting of the measured energy spectra have been completed by changing the intensities and the temperature parameters of the emission sources.The evolution of the portions and intensities of three different emission sources as a function of the emission angles has been discussed.