LosAlamos NationalLaboratory
LosAlamos NationalLaboratory
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DOI：
10.1119/1.2341160
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Ted Taylor
中科院分区：
文献类型：
--
作者：
Ted Taylor
核模型的广泛使用继续在数据评估的创建。其原因包括扩展了对更高能量的数据评估，建立了narura.i材料的等序组分数据库，以及对中间活性目标物种的评估。在这些情况下，前坝往往稀疏或不存在.随着LITi趋势的继续，评价工作中采用的核模型更多地转向基于微观的理论方法，这在一定程度上是由于越来越强大的计算资源的可用性。本文将对适用于评价的核模型的进展作一评述。这些进展包括光学模型的进展，微观和唯象的状态和能级密度理论，统一描述W平衡和非平衡反应机制的统一模型，以及改进的计算裂变瞬发辐射的方法。本文综述了核模型在当前评价工作中的应用，并对主要模型及其组成部分给出了选定的例子。在模型开发方面继续取得重大进展，这直接转化为数据库计算的改进。这一趋势将持续到未来，并受到诸如计算能力增加和对评估数据fdes的需求扩大等因素的推动。模型改进也将发生，一般趋势是直接使用更微观的模型，特别是在数据评价和/或使用微观处理来指导为应用开发的植物学。
~: The widespread use of nuclear models continues in Ihe creation of data evaluations. The reasons include exte~ion of data evaluations IO higher energies, creation of data libraries for isoropic components of narura.i marerials, and production of evaluations for mdioactive trrget species. In these cases, ex~rirnental dam am often sparse or nonex- istem. As LIti trend continues, the nuclear mmlels employed in evaluation work move ro-warcts more microscopictiy-based theoretical methods, prompted in part by the availabil- ity of increasingly powerfuJ carnputational resources. Advances m nuclear models applicable to evaluation wW be reviewed. ‘fhese include advances in optical model heo~, microscopic and phenomenological slate and level density theory, unikd modch that consisterrdy describe W equilibrium and nonequilibrium reaction mechanisms, and improved methodologies for calculation of prompt radiation from fsssion. gamma-ray of gamma-ray strength models these data, This paper has reviewed the application of nuclear models in current evaluation efforts, Selected examples were given for principal modeis and their components. Significant progress continues in model development that is directly translated into improved calculations for data libraries. This trend will continue into the future and is driven by factors such as increased computat.aonai capabilities and expanded requirements for evaluated data fdes. Model irn- provernmt will also occur with genmd trends being direct use of more microscopic models speci.tlcslly in data evalua- tion and/or usc of microscopic treatments to guide phe- riornenologydeveloped for application uses.