Ion-momentum imaging of dissociative-electron-attachment dynamics in acetylene

被引：9

作者：

Fogle, M. ^{[1
]}

Haxton, D. J. ^{[2
]}

Landers, A. L. ^{[1
]}

Orel, A. E. ^{[3
]}

Rescigno, T. N. ^{[2
]}

机构：

[1] Auburn Univ, Dept Phys, Auburn, AL 36849 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[3] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 04期

基金：

美国国家科学基金会;

关键词：

EXCITATION; SCATTERING; ENERGY; IMPACT; C2H2;

D O I：

10.1103/PhysRevA.90.042712

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present experimental results for dissociative electron attachment to acetylene near the 3 eV(2)Pi(g) resonance. In particular, we use an ion-momentum imaging technique to investigate the dissociation channel leading to C2H- fragments. From our measured ion-momentum results we extract fragment kinetic energy and angular distributions. We directly observe a significant dissociation bending dynamic associated with the formation of the transitory negative ion. In modeling this bending dynamic with ab initio electronic structure and fixed-nuclei scattering calculations we obtain good agreement with the experiment.

引用

页数：5

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