Formation of CN-, C3N-, and C5N- Molecules by Radiative Electron Attachment and their Destruction by Photodetachment

被引：35

作者：

Khamesian, Marjan ^{[1
]}

Douguet, Nicolas ^{[2
]}

dos Santos, Samantha Fonseca ^{[2
]}

Dulieu, Olivier ^{[3
]}

Raoult, Maurice ^{[3
]}

Brigg, Will J. ^{[4
]}

Kokoouline, Viatcheslav ^{[1
]}

机构：

[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[2] Drake Univ, Dept Phys & Astron, Des Moines, IA 50311 USA

[3] Univ Paris Saclay, Aime Cotton Lab, CNRS, Univ Paris Sud,ENS Cachan, Batiment 505,Campus Orsay, F-91405 Orsay, France

[4] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 12期

基金：

美国国家科学基金会;

关键词：

INTERSTELLAR; ANIONS; QUANTUM; SPECTROSCOPY; MECHANISMS; SCATTERING; COLLISIONS; CLOUDS; RATES; IONS;

D O I：

10.1103/PhysRevLett.117.123001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The existence of negative ions in interstellar clouds has been associated for several decades with the process of radiative electron attachment. In this Letter, we report compelling evidence supporting the fact that the radiative attachment of a low-energy electron is inefficient to form the carbon chain anions CN-, C3N-, and C5N- detected in interstellar clouds. The validity of the approach is confirmed by good agreement with experimental data obtained for the inverse photodetachment process, which represents the major cause of anion destruction in interstellar space. As a consequence, we suggest alternative models that could explain the formation of anions.

引用

页数：5

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