轻粒子发射时间随测量角的变化

HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION(2001)

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Abstract
利用小相对角关联方法测量了25MeV/u 40Ar+93Nb反应中关联出射的轻粒子. 通过与三体弹道模型的比较,从关联函数提取了轻粒子的发射时间. 结果表明,轻粒子的发射时间随粒子能量的升高而降低,从低能的约600fm/c下降至高能的约50fm/c. 将此数据与40Ar+197Au反应中的发射时间进行了比较,发现随着实验室系角度的增加,提取的轻粒子的发射时间变长,并认为其原因在于随发射角度的增加,前平衡发射成份越来越少,平衡发射成份增加.
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Key words
correlation function, three-body trajectory, emission time, laboratory angle
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