Townsend L W, Wilson J W, Norbury J W
NASA Langley Research Center, Hampton, VA 23665, USA.
Can J Phys. 1985;63:135-8. doi: 10.1139/p85-021.
The fragmentation of 213 MeV/nucleon 40Ar ions by 12C targets is described within the context of a simple abrasion-ablation fragmentation model. The abrasion part of the theory utilizes a quantum-mechanical formalism based upon an optical model potential approximation to the exact nucleus-nucleus multiple-scattering series. The ablation stage of the fragmentation is treated as a compound nucleus evaporation. The decay probabilities for the various particle emission channels are computed using the EVAP-4 Monte Carlo computer program. Predictions for production cross sections for isotopes of sulfur, phosphorus, silicon, and aluminum are made and compared with experimental data. The model is also used to compare predicted and experimental element production cross sections for 1.88 GeV/nucleon 56Fe colliding with 12C and 208Pb targets.
在一个简单的擦磨-烧蚀碎裂模型的框架内，描述了213兆电子伏特每核子的40Ar离子与12C靶的碎裂过程。该理论的擦磨部分采用了一种量子力学形式，它基于对精确的核-核多重散射级数的光学模型势近似。碎裂的烧蚀阶段被视为复合核蒸发。使用EVAP - 4蒙特卡罗计算机程序计算各种粒子发射通道的衰变概率。对硫、磷、硅和铝的同位素的产生截面进行了预测，并与实验数据进行了比较。该模型还用于比较预测的和实验得到的1.88千兆电子伏特每核子的56Fe与12C和208Pb靶碰撞时的元素产生截面。
