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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400AMeV36Ar+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σ2r=2fm2时的计算结果与实验结果一致;而σr=(0.88+0.09A1/3)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。不同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σ2r=2fm2时计算的同位素多。
The relationship between wave packet width and the nuclear fragmentation reaction cross section has been theoretically analyzed by using the improved model of ImQMD grafting GEMINI statistical decay model. The effects of different wave packet width on the relationship between 400AMeV36Ar + C, 20Ne and C, Al, Cu and Sn. The isotopic distributions of the 36Ar, 40Ar and Al reactions at different wave packet widths were analyzed. The analysis results show that the choice of wave packet width affects the cross section of the nuclear fragmentation and is related to the nuclear reaction system. When σ2r = 2fm2, the calculation results agree well with the experimental ones. However, the calculation results of σr = (0.88 + 0.09A1 / 3) fm have a great relationship with the system, and have obvious influence on the cross section of the reaction. The influence of different wave packet widths on the nuclear fragmentation cross section of 40Ar abundance neutrons is less than that of 36Ar nuclear fragmentation reaction cross sections, and the isotope ratio calculated by the wave width of the system distribution is σ2r = 2fm2 When calculating isotopes and more.