The Iron Project: Large-scale Atomic Calculations for Iron-Period Elements

铁项目：铁周期元素的大规模原子计算

• 批准号: 9115057
• 负责人: Anil Pradhan
• 金额: $ 21.13万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115057&HistoricalAwards=false
• 关键词: Iron; Project; Large; scale; Atomic

Accurate calculations for a number of heavy elements in various stages of ionization considering collisional excitation, radiative transitions, photoionization and recombination will be performed using the R-matrix method. The focus will be primarily on the Iron period elements in order to resolve the apparent overabundance of Ni relative to Iron in astronomical objects. Relativistic effects heretofore not considered will be incorporated into the calculations, an atomic database constructed and some astrophysical modelling performed. Close collaboration with the Opacity project is intended. The calculations will be performed on the Cray YMP at Ohio State at no cost to the NSF.

将使用 R 矩阵方法对处于不同电离阶段的许多重元素进行精确计算，考虑碰撞激发、辐射跃迁、光电离和复合。 重点将主要集中在铁周期元素上，以解决天文物体中镍相对于铁明显过量的问题。 迄今为止尚未考虑的相对论效应将被纳入计算中，构建原子数据库并进行一些天体物理建模。 旨在与 Opacity 项目密切合作。 计算将在俄亥俄州立大学的 Cray YMP 上进行，NSF 无需支付任何费用。