【摘要】 提取了 3 0MeV/u40 Ar+ natAg反应中后角出射的同位素 (6 ,7Li,3,4He)产额比温度为 5MeV .观察到这一同位素产额比温度随阈值能量Ecut/A的增加而逐渐由 5MeV上升到 6MeV .为进一步研究这一变化关系 ,用MonteCarlo方法模拟了热核蒸发粒子的过程 ,表明随粒子能量的增加 ,发射该能量粒子的发射源平均温度也在增加 .说明高温热核发射高能量粒子的几率大 .更多还原

【Abstract】 Temperature of 5MeV was extracted from double isotope ratios Y 6 Li / Y 7 Li Y 3 He / Y 4 He measured at backward angle in laboratory system in the reaction 30MeV/u 40 Ar+ nat Ag. It is observed that this temperature increases continuously from 5MeV to 6MeV with the increase of the energy threshold E cut / A . A Monte Carlo simulation on particle emission process of hot nuclei shows that the average temperature of hot nuclei as emission sources goes up gradually with increasing energies of emitted particles. It is demonstrated that hot nuclei with higher temperature are more probable to emit higher energy particles.更多还原