Observation of four-electron Auger processes

被引：3

作者：

Mueller, A. ^{[1
]}

Borovik, A., Jr. ^{[1
]}

Buhr, T. ^{[1
,2
]}

Hellhund, J. ^{[1
]}

Holste, K. ^{[1
,3
]}

Kilcoyne, A. L. D. ^{[4
]}

Klumpp, S. ^{[5
]}

Martins, M. ^{[5
]}

Ricz, S. ^{[1
,6
]}

Viefhaus, J. ^{[7
]}

Schippers, S. ^{[1
,3
]}

机构：

[1] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany

[2] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

[3] Univ Giessen, Phys Inst 1, D-35392 Giessen, Germany

[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[6] Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary

[7] DESY, FS PE, D-22607 Hamburg, Germany

来源：

XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12 | 2015年 / 635卷

关键词：

D O I：

10.1088/1742-6596/635/1/012033

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Multiple ionization of ions subsequent to absorption of a single photon has been studied employing a photon-ion merged-beam setup at the PETRA III synchrotron radiation facility of DESY in Hamburg. Absolute cross sections for single, double and triple ionization of C+ ions were measured with emphasis on specific well defined terms of K-shell excited C+. In particular, the terms C+ (1s2s(2)2p(2) D-2, P-2) were excited from the ground level of C+. Subsequent autoionization processes resulted in the production of C2+, C3+ and C4+ ions. The associated decay mechanisms are single-Auger, double-Auger and triple-Auger decay. The observation of C4+ products arising from C+ (1s2s(2)2p(2) D-2, P-2) unambiguously confirmed the existence of triple-Auger decay, i.e., a process in which 4 electrons interact with one another such that one fills the K-shell vacancy and the others are simultaneously ejected. The experiment yields branching ratios for the Auger decay channels as well as individual decay rates for autoionization and radiative stabilization of the C+ (1s2s(2) D-2, P-2) terms.

引用

页数：6

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