Wigner-Eisenbud-Smith photoionization time delay due to autoioinization resonances

被引：12

作者：

Deshmukh, P. C. ^{[1
,2
]}

Kumar, A. ^{[3
]}

Varma, H. R. ^{[3
]}

Banerjee, S. ^{[4
]}

Manson, Steven T. ^{[5
]}

Dolmatov, V. K. ^{[6
]}

Kheifets, A. S. ^{[7
]}

机构：

[1] Indian Inst Technol Tirupati, Dept Phys, Tirupati 517506, Andhra Pradesh, India

[2] Indian Inst Sci Educ & Res, Dept Phys, Tirupati 517507, Andhra Pradesh, India

[3] Indian Inst Technol Mandi, Sch Basic Sci, Kamand 175005, HP, India

[4] Indian Inst Technol Madras, Dept Phys, Madras 600036, Tamil Nadu, India

[5] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA

[6] Univ North Alabama, Dept Phys & Earth Sci, Florence, AL 35632 USA

[7] Australian Natl Univ, Res Sch Phys & Engn, Canberra, ACT 0200, Australia

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2018年 / 51卷 / 06期

关键词：

Wigner-Eisenbud-Smith time delay; autoionization; Fano parametrisation; relativistic random phase approximation; relativistic multichannel quantum defect theory; QUANTUM-DEFECT THEORY; PHOTOEMISSION; SCATTERING; XENON; STATE; NEON;

D O I：

10.1088/1361-6455/aaae33

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An empirical ansatz for the complex photoionization amplitude and Wigner-Eisenbud-Smith time delay in the vicinity of a Fano autoionization resonance are proposed to evaluate and interpret the time delay in the resonant region. The utility of this expression is evaluated in comparison with accurate numerical calculations employing the ab initio relativistic random phase approximation and relativistic multichannel quantum defect theory. The indisputably good qualitative agreement (and semiquantitative agreement) between corresponding results of the proposed model and results produced by the ab initio theories proves the usability of the model. In addition, the phenomenology of the time delay in the vicinity of multichannel autoionizing resonances is detailed.

引用

页数：8

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