High resolution study of the inner-shell 3p-3d and 3p-5s resonance regions in calcium atoms

被引：1
|
作者：
Iablonskyi, D. [1 ]
Urpelainen, S. [1 ,2 ]
Huttula, S. -M. [1 ]
Fritzsche, S. [1 ,3 ]
Huttula, M. [1 ]
机构：
[1] Univ Oulu, Dept Phys Sci, FI-90014 Oulu, Finland
[2] Lund Univ, MAX Lab 4, SE-22100 Lund, Sweden
[3] GSI Helmholzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
来源：
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2013年 / 186卷
基金：
芬兰科学院;
关键词：
Photoelectron yield; Resonant Auger decay; Post collision interaction; Rydberg states; Atomic Ca; Ab initio calculations; PHOTON-ENERGY-RANGE; ELECTRON-IMPACT; CROSS-SECTIONS; CA; PHOTOIONIZATION; EXCITATION; SPECTRUM; PROGRAM; SPECTATOR; STATES;
D O I：
10.1016/j.elspec.2013.01.015
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The 3p(5)4s(2)3d P-1(1) and 3p(5)(P-2(3/2))4s(2)5s (2)[3/2](1) resonance regions of Ca atoms have been studied experimentally with the aid of synchrotron radiation excited electron spectroscopy. The strong configuration interaction of the 3p(5)4s(2)3d, 3p(5)4s(2)5s and several other nearly degenerate configurations leads to complex structures observed in the photoelectron yield spectrum. Multiconfiguration Dirac-Fock (MCDF) calculations have been performed for these 3p-excited resonances of neutral calcium and compared to experimental results. The excitation and subsequent autoionization of these resonances lead to the final ionic 3p(6)nl states from which new high-lying members of the Rydberg p-series have been resolved experimentally. These new levels agree reasonably well with calculations as well as with the extrapolation of the Rydberg formula. The post collision interaction (PCI) effect has been observed in the transition Ca+ 3p(5)3d4s P-2(1/2,3/2)-> Ca2+ 3p(6) S-1(0) + e(Auger)(-) and explained by means of the rather long core-hole lifetime, while the decay of Ca+ 3p(5)3d4s P-4(1/2),(3/2,5/2) states is not affected by PCI. (c) 2013 Elsevier B.V. All rights reserved.
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页码：8 / 13
页数：6
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