30MeV/u 40 Ar+112,124Sn反应后角能谱温度的同位旋效应

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在 30MeV/u4 0 Ar +112 ,12 4 Sn反应中用平行板雪崩计数器实现了前冲余核的测量 .在不同的线性动量转移下用运动源模型拟合了后角的3 He,α和6He能谱 ,发现3 He的能谱斜率温度在12 4 Sn系统中高于112 Sn系统 ,而6He的温度在112 Sn系统中更高 ,α粒子在两个系统中没有明显差别 .用热核粒子蒸发过程衰变道的选择性对这种同位旋相关性进行了解释 .GEMINI的计算不能重现实验结果 In the 30MeV / u4 0 Ar +112, 12 4 Sn reaction, a parallel plate avalanche counter was used to measure the hellofrequency. The kinematic source model was used to fit the 3 He, α and 6He spectra and found that the energy spectrum slope of 3 He is higher than that of 112 Sn system in 12 4 Sn system and the temperature of 6He is higher in 112 Sn system.The α particles have no obvious difference in the two systems.Using thermonuclear particles This isospin dependence is explained by the selectivity of decay traces in the evaporation process. The calculation of GEMINI does not reproduce the experimental results
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