The multielectron character of the S 2p → 4eg shape resonance in the SF6 molecule studied via detection of soft X-ray emission and neutral high-Rydberg fragments

被引：5

作者：

Kivimaki, A. ^{[1
]}

Coreno, M. ^{[2
]}

Miotti, P. ^{[3
]}

Frassetto, F. ^{[3
]}

Poletto, L. ^{[3
]}

Strahlman, C. ^{[4
]}

de Simone, M. ^{[1
]}

Richter, R. ^{[5
]}

机构：

[1] CNR, IOM, Lab TASC, I-34149 Trieste, Italy

[2] CNR, ISM, Basovizza Area Sci Pk, I-34149 Trieste, Italy

[3] CNR, IFN, Via Trasea 7, I-35131 Padua, Italy

[4] Lund Univ, Max Lab 4, POB 118, S-22100 Lund, Sweden

[5] Elettra Sincrotrone Trieste, Area Sci Pk Basovizza, I-34149 Trieste, Italy

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2016年 / 209卷

关键词：

SF6; Soft X-ray emission; High-Rydberg states; Shape resonance; Shake-up transitions; Double excitations; VALENCE-SHELL; ELECTRON-IMPACT; C-1S PHOTOIONIZATION; ABSORPTION-SPECTRA; INNER-SHELL; EXCITATION; SPECTROSCOPY; THRESHOLD; S-2P;

D O I：

10.1016/j.elspec.2016.03.002

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We have studied the nature of the S 2p -> 4e(g) shape resonance in the SF6 molecule by performing two different experiments. Soft X-ray emission spectra measured at the 4e(g) shape resonance reveal features that do not originate from the S 2p(-1) states. One of the features can be assigned to the 6a(1g) -> S 2p transition. The 6a(1g) orbital, which is empty in the molecular ground state, can be populated either in core-valence double excitations or in S 2p shake-up transitions. Both these channels are considered. We have also studied the fragmentation of SF6 molecule after the decay of the S 2p core-hole states by observing neutral fragments in high-Rydberg states, where an electron occupies an orbital with n >= 20 (n is the principal quantum number). Such neutral fragments become, in relative terms, more abundant at the S 2p -> 4e(g) shape resonance with respect to the S 2p -> 2t(2g) shape resonance, which is a pure one-electron phenomenon. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：26 / 33

页数：8