Long-lived metastable anions of hydrogen halides

Article

Long-lived metastable anions of hydrogen halides

Čížek, M.; Horáček, J.

Int. J. Mass Spectrom. 280, 149-153 (2009)

Abstract

We search for narrow resonances in cross-sections for electron collisions with HCl, DCl, HBr and DBr
molecules, calculated with the nonlocal resonance model. Narrow resonances corresponding to longlived
metastable states of anionic molecules are indeed found in both elastic and vibrational excitation
cross-sections. The largest lifetime tau= 0.11ms is predicted for HBr− with rotational quantum number
J = 20. For HCl we find maximum tau 0.6ns for J = 22 and tau=0.6micro-s for J = 33 in DCl. A surprising isotope
effect is found for DBr, where the largest lifetime is tau=1.5micros., i.e., much smaller than for HBr.

Keywords

Molecular anion, Resonance, Electron–molecule collision, Ion-atom collision

Institute authors

Supported by

GAAV IAA100400501 — Dynamika excitovaných molekulárních systémů

BibTeX

@article{UTF343,
  author        = {Čížek, M. and Horáček, J.},
  title         = {{Long-lived metastable anions of hydrogen halides}},
  journal       = {Int. J. Mass Spectrom.},
  volume        = {280},
  pages         = {149-153},
  year          = {2009},
  month         = {2},
  doi           = {10.1016/j.ijms.2008.07.034},
}