Electron collisions with cyanoacetylene HC3N: Vibrational excitation and dissociative electron attachment

被引：21

作者：

Rankovic, M. ^{[1
]}

Nag, P. ^{[1
]}

Zawadzki, M. ^{[1
,2
]}

Ballauf, L. ^{[3
]}

Zabka, J. ^{[1
]}

Polasek, M. ^{[1
]}

Kocisek, J. ^{[1
]}

Fedor, J. ^{[1
]}

机构：

[1] Czech Acad Sci, J Heyrovsky Inst Phys Chem, Dolejskova 3, Prague 18223, Czech Republic

[2] Gdansk Univ Technol, Fac Appl Phys & Math, Dept Atom Mol & Opt Phys, Ul G Narutowicza 11-12, PL-80233 Gdansk, Poland

[3] Univ Innsbruck, Inst Ion Phys & Appl Phys, Technikerstr 25, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW A | 2018年 / 98卷 / 05期

关键词：

CROSS-SECTIONS; NEGATIVE-IONS; ASTRONOMICAL DETECTION; IMPACT; MOLECULES; STATES;

D O I：

10.1103/PhysRevA.98.052708

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally probe electron collisions with HC3N in the energy range from 0 to 10 eV with the focus on vibrational excitation and dissociative electron attachment. The vibrational excitation cross sections show a number of resonances which are mode specific: the two dominant pi* resonances are visible in the excitation of all the vibrational modes; however, broad sigma* resonances are visible only in certain bond-stretching vibrational modes. The lower pi* resonance shows a pronounced boomerang structure. Since it overlaps with the threshold peak originating from a long-range electron-molecule interaction, the interference pattern is rather unusual. Somewhat surprisingly, the boomerang structure is visible also in the elastic scattering cross section. The dissociative electron attachment cross sections agree qualitatively with the data of Gilmore and Field [J. Phys. B 48, 035201 (2015)]; however, approximately a factor of two difference is found in the absolute values.

引用

页数：9

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