The odd-even effect of fragmentation cross sections for 36Ar and 40Ar
The odd-even effect of fragmentation cross sections for 36Ar and 40Ar
复制标题
36Ar和40Ar碎裂截面的奇偶效应
DOI：
10.1088/0954-3899/42/1/015102
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
D H Zhang
中科院分区：
文献类型：
--
作者：
J X Cheng;J L Tian;D H Zhang
用改进的量子分子动力学模型和统计模型程序GEMINI计算了400 A MeV Ar 36和Ar 40与C、Al、Cu和Pb靶反应的弹丸碎裂截面。总截面随着靶质量的增加而增加，这与实验结果和其他理论预测是一致的。同位素分布和同位旋分布表明，奇偶效应与入射核有关。对于T = 0 Z的Ar 36射弹，部分截面出现明显的奇偶效应，同位素分布表明偶数Z同位素的最大截面大于相邻的奇数Z同位素的最大截面。然而，Ar 40射弹的碎裂截面和同位素分布没有显示出这些特征。同位旋分布表明，= T0 Z弹的碎片奇偶效应比=− T2 Z弹的强.
Projectile fragmentation cross sections are calculated for reactions of Ar 36 and Ar 40 on C, Al, Cu, and Pb targets at 400 A MeV by using the improved quantum molecular dynamics model, together with the statistical model code GEMINI. The total cross sections increase with increasing target mass, which is in good agreement with the experimental results and other theoretical predictions. The isotopic distributions and isospin distributions suggest that the odd–even effect is dependent on the projectile nuclei. For a Ar 36 projectile with= T 0 Z, the partial cross sections appear an obvious odd–even effect, and the isotopic distributions show that the maximal cross sections for the even-Z isotope are larger than that for the neighboring odd-Z isotope. However, the fragmentation cross sections and the isotopic distributions for the Ar 40 projectile have not shown these characteristics. The isospin distributions show that the odd–even effect of fragments from the= T 0 Z projectile is stronger than that from the=− T 2 Z projectile.