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利用符合的粒子粒子关联测量,研究了25MeV/u40Ar+197Au反应中不稳定轻核的在平面发射和出平面发射.对于中速的不稳定轻核,观测到在平面发射几率增大,这表明该反应系统中存在旋转效应.该现象随碰撞参数增大更为强烈,而随着不稳定核激发态能量的升高稍有变弱The in-plane and out-of-plane emission of unstable light nuclei was measured in the reaction of 40Ar+197Au at energy 25MeV/u by means of extensive particle-particle correlation. An in-plane enhancement is observed for mid-rapidity unstable light nuclei, indicating a rotational effect exists in this reaction system. This in-plane enhanced emission becomes stronger with increasing of impact parameter, but becomes a little weaker with increasiong of energy of the excited state.
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