Single-proton removal reaction in the IQMD+GEMINI model benchmarked by elemental fragmentation cross sections of 29−33Si on carbon at ∼230 MeV/nucleon

Single-proton removal reaction in the IQMD+GEMINI model benchmarked by elemental fragmentation cross sections of 29−33Si on carbon at ∼230 MeV/nucleon

We report on the first measurement of the elemental fragmentation cross sections (EFCSs) of Si29−33 on a carbon target at ∼230 MeV/nucleon. The experimental data covering charge changes of ΔZ = 1-4 are reproduced well by the isospin-dependent quantum molecular dynamics (IQMD) coupled with the evapor...

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Main Authors: Guang-Shuai Li, Bao-Hua Sun, Jun Su, Isao Tanihata, Satoru Terashima, Jian-Wei Zhao, Er-Xi Xiao, Ji-Chao Zhang, Liu-Chun He, Ge Guo, Wei-Ping Lin, Wen-Jian Lin, Chuan-Ye Liu, Chen-Gui Lu, Bo Mei, Dan-Yang Pang, Ye-Lei Sun, Zhi-Yu Sun, Meng Wang, Feng Wang, Jing Wang, Shi-Tao Wang, Xiu-Lin Wei, Xiao-Dong Xu, Jun-Yao Xu, Li-Hua Zhu, Yong Zheng, Mei-Xue Zhang, Xue-Heng Zhang
Format: Article
Language:English
Published: Elsevier 2024-12-01
Series:Physics Letters B
Subjects:
Elemental fragmentation cross sections
IQMD+GEMINI
Single-proton removal reaction
Proton evaporation
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269324007019
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Summary:We report on the first measurement of the elemental fragmentation cross sections (EFCSs) of Si29−33 on a carbon target at ∼230 MeV/nucleon. The experimental data covering charge changes of ΔZ = 1-4 are reproduced well by the isospin-dependent quantum molecular dynamics (IQMD) coupled with the evaporation GEMINI (IQMD+GEMINI) model. We further explore the mechanisms underlying the single-proton removal reaction in this model framework. We conclude that the cross sections from direct proton knockout exhibit an overall weak dependence on the mass number of Si projectiles. The proton evaporation induced after the projectile excitation significantly affects the cross sections for neutron-deficient Si isotopes, while neutron evaporation plays a crucial role in the reactions of neutron-rich Si isotopes. It is presented that the relative magnitude of one-proton and one-neutron separation energies is an essential factor that influences evaporation processes. Therefore, proton evaporation should be incorporated into the reaction model in addition to the direct proton knockout in analyses of Gade-Tostevin systematic for single-proton removal reactions.
ISSN:0370-2693

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