Title

Photodetachment cross sections of the C2nH- (n=1-3) hydrocarbon-chain anions

Authors

Authors

N. Douguet; V. Kokoouline;A. E. Orel

Comments

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Abbreviated Journal Title

Phys. Rev. A

Keywords

AB-INITIO CHARACTERIZATION; KOHN VARIATIONAL METHOD; EXCITED-STATES; NEGATIVE-IONS; ASTRONOMICAL IDENTIFICATION; CIRCUMSTELLAR ENVELOPES; PHOTOELECTRON-SPECTRA; INTERSTELLAR CLOUDS; ELECTRONIC STATES; C4H; Optics; Physics, Atomic, Molecular & Chemical

Abstract

We report theoretical results of the low-energy photodetachment cross sections of the C2H-, C4H-, and C6H- hydrocarbon-chain anions. The complex Kohn variational technique is used to calculate molecular-frame transition dipole moments from the anion ground state to a photoelectron in the continuum of the neutral radical. We employ the Franck-Condon approximation and include interchannel electronic coupling to determine the low-energy photodetachment cross sections and asymmetry parameters. We discuss the behavior of the cross section, especially near thresholds, and describe the role of electronic resonances and excited channels. The theoretical results reproduce the main characteristics of recent measurements of absolute photodetachment cross sections.

Journal Title

Physical Review A

Volume

90

Issue/Number

6

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

11

WOS Identifier

WOS:000345871100007

ISSN

1050-2947

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