多电荷离子双电子复合中的宇称不守恒效应(英文)  

Parity Nonconservation in Dielectronic Recombination of Multiply Charged Ions

作　　者：M G Kozlov G F Gribakin F J Currell 

机构地区：[1]Petersburg Nuclear Physics Institute, Gatchina 188300, Russia [2]School of Mathematics and Physics, Queen's University, Belfast BT7 1NN,Northern Ireland, United Kingdom

出　　处：《复旦学报（自然科学版）》2007年第1期50-53,共4页Journal of Fudan University：Natural Science

摘　　要：A parity nonconserving (PNC) asymmetry in the cross section for dielectronic recombination of polarized electrons on multiply charged ions with Z≥40 is discussed. This effect is strongly enhanced for close doubly-excited states of opposite parity in the intermediate compound ion. Such states are known for He-like ions.However, these levels have large energy and large radiative widths which hampers observation of the PNC asymmetry. We argue that accidentally degenerate states of more complex ions may be more suitable for the corresponding experiment.A parity nonconserving （PNC） asymmetry in the cross section for dielectronic recombination of polarized electrons on multiply charged ions with Z≥40 is discussed. This effect is strongly enhanced for close doubly-excited states of opposite parity in the intermediate compound ion. Such states are known for He-like ions. However, these levels have large energy and large radiative widths which hampers observation of the PNC asymmetry. We argue that accidentally degenerate states of more complex ions may be more suitable for the coresponding experiment.

关 键 词：奇偶不守恒不对称 二维电子重组 带电离子 激发状态 

分 类 号：O571[理学—粒子物理与原子核物理]