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Report No.
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Application of JAERI Quantum Molecular Dynamics model for collisions of heavy nuclei

Ogawa, Tatsuhiko; Hashimoto, Shintaro; Sato, Tatsuhiko; Niita, Koji*

Nucleus-nucleus reactions models are important for radiological safety in heavy ions accelerator facilities such as heavy ion cancer therapy facilities. As one of such models, JAERI Quantum Molecular Dynamics (JQMD) has been successfully used to describe production of residue and secondary particles in nucleus-nucleus collisions. However, it has been pinpointed that formulation of interactions between nucleons were unstable through time evolution therefore heavy nuclei tended to decay before interactions. Such decays could not be distinguished from decay by collisions. In this study, we revised the description of interactions between nucleons to stabilize nuclei before collisions. Moreover, an algorithm to check the stability of ground-state nuclei was introduced. Description of nucleon-nucleon scattering cross sections were improved by introducing the in-medium effects. Fragment production cross sections for heavy targets (e.g. Ag) are predicted in better accuracy by thus developed revised JQMD (JQMD 2.0).

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