用Geant4工具包研究扩展介质中的核碎裂反应
Nuclear fragmentation reactions in extended media studied with Geant4 toolkit
摘要：
从大量的实验中可以知道，在能量超过100 A MeV的核-核碰撞中，核多重碎裂是产生中等质量碎片的主要机制。在本文中，我们调查的有效性和性能的费米分裂模型和统计多重碎片模型的Geant 4工具包的一部分。本文研究了剧烈核衰变反应对轻、中质量核束在扩展介质中传播的深度-剂量分布和次级碎片产额的影响。离子束癌症治疗和宇宙辐射屏蔽的影响进行了讨论。
英文摘要：
It is well known from numerous experiments that nuclear multifragmentation is a dominating mechanism for production of intermediate-mass fragments in nucleus-nucleus collisions at energies above 100 A MeV. In this paper we investigate the validity and performance of the Fermi break-up model and the statistical multifragmentation model implemented as parts of the Geant4 toolkit. We study the impact of violent nuclear disintegration reactions on the depth-dose profiles and yields of secondary fragments for beams of light and medium-weight nuclei propagating in extended media. Implications for ion-beam cancer therapy and shielding from cosmic radiation are discussed.
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