التفاصيل البيبلوغرافية
| العنوان: |
Generalization of the SPRT Method for the Modeling of the Neutron Cross Sections in the Unresolved Resonance Range |
| المؤلفون: |
Rich, E., Noguère, Gilles, Jean, C. De Saint, Tudora, A. |
| المصدر: |
Nuclear Science and Engineering; May 2009, Vol. 162 Issue: 1 p76-86, 11p |
| مستخلص: |
AbstractFor the modeling of the neutron cross sections, three energy ranges can be distinguished. The resolved resonance range can be interpreted in terms of single-level, multilevel, Reich-Moore, or R-matrix parameters. The unresolved resonance range (URR) is described with the average R-matrix and Hauser-Feshbach formalisms. For the high energies (“continuum”), optical model parameters are used in association with statistical and preequilibrium models. One of the main challenges of such a work is to study the consistency of the average parameters obtained by these different calculations. With the ESTIMA and SPRT methods, we provide a set of parameters for partial s-waves and p-waves (strength functions Sland effective potential scattering radius R’). However, accurate analysis of the URR domain needs more information than parameters R’ and Slassociated with orbital moments l= 0 and l= 1. Using links between the average R-matrix formalism and the optical model calculations, we propose a generalization of the SPRT method for l> 1 and a new description of the URR domain in terms of Sland RlJ¥. |
| قاعدة البيانات: |
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