Valence-shell photoionization of chlorinelike Ar+ ions

被引：32

作者：

Covington, A. M. ^{[1
]}

Aguilar, A. ^{[1
]}

Covington, I. R. ^{[1
]}

Hinojosa, G. ^{[1
]}

Shirley, C. A. ^{[1
]}

Phaneuf, R. A. ^{[1
]}

Alvarez, I. ^{[2
]}

Cisneros, C. ^{[2
]}

Dominguez-Lopez, I. ^{[3
]}

Sant'Anna, M. M. ^{[3
]}

Schlachter, A. S. ^{[3
]}

Ballance, C. P. ^{[4
]}

McLaughlin, B. M. ^{[5
]}

机构：

[1] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[2] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62131, Morelos, Mexico

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[4] Auburn Univ, Dept Phys, Auburn, AL 36840 USA

[5] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 01期

基金：

美国国家科学基金会;

关键词：

DOUBLY-EXCITED RESONANCES; CROSS-SECTIONS; ORION ASSOCIATION; ABSOLUTE; SPECTRUM; ABUNDANCES; C+;

D O I：

10.1103/PhysRevA.84.013413

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Absolute cross-section measurements for valence-shell photoionization of Ar+ ions are reported for photon energies ranging from 27.4 to 60.0 eV. The data, taken by merging beams of ions and synchrotron radiation at a photon energy resolution of 10 meV, indicate that the primary ion beam was a statistically weighted mixture of the P-2(3/2)o ground state and the P-2(1/2)o metastable state of Ar+. Photoionization of this Cl-like ion is characterized by multiple Rydberg series of autoionizing resonances superimposed on a direct photoionization continuum. Observed resonance line shapes indicate interference between indirect and direct photoionization channels. Resonance features are spectroscopically assigned and their energies and quantum defects are tabulated. The measurements are satisfactorily reproduced by theoretical calculations based on an intermediate coupling semirelativistic Breit-Pauli approximation.

引用

页数：11

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