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EFFECTS OF CHANNEL INTERACTION, EXCHANGE, AND RELAXATION ON THE ANGULAR-DISTRIBUTION AND SPIN POLARIZATION OF AUGER ELECTRONS FROM NOBLE-GAS ATOMSстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: TULKKI J., KABACHNIK NM, AKSELA H.
- Журнал: Physical Review A - Atomic, Molecular, and Optical Physics
- Том: 48
- Номер: 2
- Год издания: 1993
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 1277
- Последняя страница: 1291
- DOI: 10.1103/PhysRevA.48.1277
- Аннотация: The angular anisotropy alpha2 and spin polarization xi2 parameters have been calculated for Ar L3MM, Kr M4,5NN, Xe N4,500, and Xe M4,5NN Auger transitions using the multichannel multicoufiguration Dirac-Fock method (MMCDF). The results of our MMCDF calculations are in good general agreement with experiment. We have also determined the separate contributions of the exchange, relaxation, and channel interaction to the angular anisotropy of the Auger process. We have shown that especially for Auger lines having at least two strong partial amplitudes corresponding to different values of the orbital angular momentum both the exchange and channel interaction can change the value of the alpha2 parameter significantly and sometimes even change its sign. Because of the additional eigenchannel phase shifts the alpha2 parameters are more sensitive to channel interaction than to the exchange. In contrast the relaxation has a small effect on the angular distribution of Auger electrons. A comparative study showed that the alpha2 parameters are usually less sensitive to correlation than the branching ratios or even the total Auger rates. This was traced back to universal scaling of the modulus of transition amplitudes and to the existence of one dominating ionization channel in most transitions. The xi2 parameters were small for all strong Auger lines and exceedingly sensitive to all correlation effects.
- Добавил в систему: Кабачник Николай Мартинович