$^{20}$ Ne + $^{12}$ C反应生成的热$^{32}$ S $^{*}$的轻带电粒子发射
Light charged particle emission from hot $^{32}$S$^{*}$ formed in $^{20}$Ne + $^{12}$C reaction
摘要：
在$^{20}$ Ne（158，170，180，200 MeV）+ $^{12}$ C反应中，在10 ° $^{o}$ - 50 ° $^{o}$角范围内测量了轻带电粒子（$p, d, t$和$α$）的能量分布.独家轻带电粒子的能量分布测量也做了相同的系统在158 MeV的轰击能量的面内轻带电粒子-碎片符合。采用考虑双源的移动源模型，从质子能谱中分离出预平衡分量。的数据进行了比较，与预测的统计模型代码级联。已经观察到，为了解释蒸发的$d, t$能谱的形状，需要在复合核中引入显著的形变效应。对于质子，蒸发能谱对核变形相当不敏感，尽管没有变形就不能解释角分布。利用$^{20}$ Ne（158 MeV）+ $^{12}$ C反应，通过排他的轻带电粒子测量，研究了$^{32}$ S热核的衰变序列.通过实验数据与统计模型预测的比较，提取了有关连续衰变链的信息。从分析中可以看出，轻带电粒子的独家数据可以作为探测热轻化合物衰变序列的有力工具。
英文摘要：
Inclusive energy distributions for light charged particles ($p, d, t$ and $α$) have been measured in the $^{20}$Ne (158, 170, 180, 200 MeV) + $^{12}$C reactions in the angular range 10$^{o}$ -- 50$^{o}$. Exclusive light charged particle energy distribution measurements were also done for the same system at 158 MeV bombarding energy by in-plane light charged particle -- fragment coincidence. Pre-equilibrium components have been separated out from proton energy spectra using moving source model considering two sources. The data have been compared with the predictions of the statistical model code CASCADE. It has been observed that significant deformation effects were needed to be introduced in the compound nucleus in order to explain the shape of the evaporated $d, t$ energy spectra. For protons, evaporated energy spectra were rather insensitive to nuclear deformation, though angular distributions could not be explained without deformation. Decay sequence of the hot $^{32}$S nucleus has been investigated through exclusive light charged particle measurements using the $^{20}$Ne (158 MeV) + $^{12}$C reaction. Information on the sequential decay chain has been extracted through comparison of the experimental data with the predictions of the statistical model. It is observed from the present analysis that exclusive light charged particle data may be used as a powerful tool to probe the decay sequence of hot light compound systems.
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