An energy-dependent numerical model for the condensation probability,

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• 作者：Leslie M. Kerby ; ^{kerblesl@isu.edu}
• 关键词：Condensation probability ; Nuclear spallation reactions ; Monte Carlo ; Transport codes ; MCNP6 ; Cascade exciton model (CEM) ; Fragment spectra
• 刊名：Computer Physics Communications
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：213
• 期：Complete
• 页码：29-39
• 全文大小：3403 K
• 卷排序：213

文摘

The “condensation” probability, γjγj, is an important variable in the preequilibrium stage of nuclear spallation reactions. It represents the probability that pjpj excited nucleons (excitons) will “condense” to form complex particle type jj in the excited residual nucleus. It has a significant impact on the emission width, or probability of emitting fragment type jj from the residual nucleus. Previous formulations for γjγj were energy-independent and valid for fragments up to 4He only. This paper explores the formulation of a new model for γjγj, one which is energy-dependent and valid for up to 28Mg, and which provides improved fits compared to experimental fragment spectra.