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Applicability of pre-equilibrium coalescence model to evaluation of alpha-particle production cross sections

Kunieda, Satoshi  ; Fukahori, Tokio  ; Hirayama, Shusuke*; Watanabe, Yukinobu*

Applicability of the pre-equilibrium coalescence model was investigated toward advanced nuclear data. This study was devoted to the analysis for nucleon-induced alpha-particle production cross sections up to 200 MeV. The optical model calculation was performed with suitable potential parameters both for incident- and outgoing- channels. The Iwamoto-Harada-Sato coalescence model was tentatively incorporated into the GNASH code in order to take account the pickup contribution from the pre-equilibrium stages. It was found that the present approach can reproduce measured cross sections better than empirical models which had been commonly used for nuclear data evaluations up to $$sim$$100 MeV. From comparisons between the model calculations and measurements, we discuss the behaviors of the model parameters and applicability limit of the present approach.

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Category:Physics, Multidisciplinary

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