Electron-impact excitation cross sections of K*(3p(5)4s(2) 2P(3/2) 2P(1/2)) autoionizing states: strong fine-structure dependence near thresholdстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The electron-impact cross sections of the inner-shell excited autoionizing states K*(3p(5)4s(2) 2P(3/2)) and K*(3p(5)4s(2) 2P(1/2)) were measured for the incident energy ranges from threshold up to 1 keV and up to 37.2 eV, respectively. A strong negative-ion resonance structure was found in the excitation cross section of the 2P(3/2) state close to the threshold, whereas the excitation function of the 2P(1/2) state is rather smooth. For impact energies below 40 eV the cross section ratio R of the fine-structure components shows a substantial energy-dependent deviation from the statistical value R = 2. The present experimental values are compared with recent theoretical results obtained in the distorted-wave Born approximation.