关键词: 
弹核碎裂 /
ImQMD模型 /
GEMINI 模型 /
波包宽度

摘要: 运用改进的量子分子动力学(ImQMD)模型嫁接GEMINI统计衰变模型对波包宽度与弹核碎裂反应截面之间的关系进行了理论分析，分析了不同的波包宽度对400 AMeV 36Ar+C，20Ne与C，Al，Cu，Sn弹核碎裂反应截面的影响，分析了同位素36Ar，40Ar与Al反应在不同的波包宽度下的同位素分布。分析结果表明：波包宽度的选择影响着弹核碎裂的反应截面，并且与核反应体系有关。当σ²_r = 2 fm²时的计算结果与实验结果一致；而σ_r =(0.88+0.09 A^1/3) fm的计算结果与体系有很大的关系，对弹核碎裂的反应截面影响明显。不的波包宽度对丰中子核⁴⁰Ar的弹核碎裂反应截面的影响要小于对³⁶Ar的弹核碎裂反应截面的影响，而且随体系分布的波包宽度计算的同位素要比σ²_r =2 fm²时计算的同位素多。The relations between wave packet width and projectile fragmentation cross sections are studied in theory by using the improved quantum molecular dynamics (ImQMD) and GEMINI models. The effect of different wave packet width for projectile fragmentation cross sections is analyzed for the reaction ³⁶Ar on C, ²⁰Ne on C, Al, Cu, Sn at 400 AMeV, the isotope distributions with different wave packet width are studied for reactions ³⁶Ar, ⁴⁰Ar on Al. The results show that the projectile fragmentation cross sections are affected by the choice of the wave packet width, and are related to the system of nuclear reaction. The calculation results of σ²_r =2 fm²are in agreement with the experimental results, but the results of σ_r = (0.88+0.09A^1/3) fm have a strong relation with reaction system and the projectile fragmentation cross sections are affected obviously. The influence of wave packet width for ⁴⁰Ar projectile fragmentation cross sections is smaller than that for ³⁶Ar.Moreover isotope distributions with system-size-dependent wave packet width are larger than with σ²_r =2 fm².