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用修正的统计擦去模型计算了中能重离子碎裂反应产生的同位素分布的同位旋效应 ,发现随着 (Zproj-Z) /Zproj的增大 ,碎裂反应的同位旋效应将逐渐减小直到消失 .同时 ,研究表明碎裂反应的同位旋效应的消失主要是由擦去阶段的几何效应和随后的蒸发效应导致的 .
The isospin effect of the isotope distributions produced by the heavy ion fragmentation reaction was calculated using a modified statistical erase model and found that the isospin effect of the fragmentation reaction decreases as (Zproj-Z) / Zproj increases Until disappear.At the same time, studies have shown that the disappearance of the isospin effect of the fragmentation reaction is mainly caused by the geometric effect of the wiping stage and the subsequent evaporation effect.