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The role of cascade processes in electron-impact excitation of the (3p(5)4s(2)) 2P(3/2),(1/2) autoionizing levels in potassiumстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Kupliauskiene A., Bogdanovich P., Borovik A.A., Grum-Grzhimailo A.N., Bartschat K.
- Журнал: Journal of Physics B: Atomic, Molecular and Optical Physics
- Том: 39
- Номер: 3
- Год издания: 2006
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 591
- Последняя страница: 601
- DOI: 10.1088/0953-4075/39/3/012
- Аннотация: The cascade population of the (3p(5) 4s(2))2P(3/2),(1/2) lowest autoionizing levels in potassium has been studied to shed light on recent experimental observations of a noticeable enhancement in the cross sections around 22 eV incident electron energy. The ejected-electron excitation functions of both levels have been re-measured in the range of 20-28 eV, and calculations of the decay parameters for the 3p(5)4s4p levels have been performed in single-configuration Hartree-Fock and configuration-interaction approaches. The analysis of these results, together with other available experimental and theoretical data on the 3p subshell excitation in potassium, revealed a relatively small contribution (< 3%) of radiative transitions from the (3p(5)4s4p(1)P)2(P), 2D levels to the apparent (including cascade contributions) excitation cross sections of the (3p(5) 4s(2))2P(3/2,1/2) levels. However, the decay of negative-ion resonances associated with the upper doublets in the 3p(5)4s4p and 3p(5)3d4s configurations may lead to a significant cascade population of the (3p(5)4s(2))2P(3/2,1/2) levels in the impact energy region 21-28 eV.
- Добавил в систему: Грум-Гржимайло Алексей Николаевич