CAJ | 학술논문

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σ2r =2 fm2时的计算结果与实验结果一致；而σr=(0.88+0.09 A1/3) 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40 Ar的弹核碎裂反应截面的影响要小于对36 Ar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=2 fm2时计算的同位素多。
운용개진적양자분자동역학(ImQMD)모형가접GEMINI통계쇠변모형대파포관도여탄핵쇄렬반응절면지간적관계진행료이론분석，분석료불동적파포관도대400 AMeV 36Ar+C，20Ne여C，Al，Cu，Sn탄핵쇄렬반응절면적영향，분석료동위소36Ar，40Ar여Al반응재불동적파포관도하적동위소분포。분석결과표명：파포관도적선택영향착탄핵쇄렬적반응절면，병차여핵반응체계유관。당σ2r =2 fm2시적계산결과여실험결과일치；이σr=(0.88+0.09 A1/3) fm적계산결과여체계유흔대적관계，대탄핵쇄렬적반응절면영향명현。불동적파포관도대봉중자핵40 Ar적탄핵쇄렬반응절면적영향요소우대36 Ar적탄핵쇄렬반응절면적영향，이차수체계분포적파포관도계산적동위소요비σ2r=2 fm2시계산적동위소다。
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 pro jectile fragmentation cross sections is analyzed for the reaction 36 Ar on C, 20Ne on C, Al, Cu, Sn at 400 AMeV, the isotope distributions with different wave packet width are studied for reactions 36 Ar, 40 Ar on Al. The results show that the pro jectile 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 ofσ2r =2 fm2 are in agreement with the experimental results, but the results of σr=(0.88+0.09A1/3) fm have a strong relation with reaction system and the pro jectile fragmentation cross sections are affected obviously. The influence of wave packet width for 40 Ar pro jectile fragmentation cross sections is smaller than that for 36 Ar. Moreover isotope distributions with system-size-dependent wave packet width are larger than withσ2r=2 fm2.