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Negative- and positive-ion fragmentation of core-excited formic-acid molecules studied with three- and four-ion coincidence spectroscopy

Stråhlman, Christian LU ; Kivimäki, Antti LU ; Richter, Robert and Sankari, Rami LU (2017) In Physical Review A 96(2).
Abstract

The negative-ion fragmentation of formic acid (HCOOH) is studied with negative- and positive-ion coincidence spectroscopy. We report four-body ionic fragmentation where up to three positive ions are collected in coincidence with one negative ion. We report yields for 21 three-body channels and five four-body channels. More than 80% of all negative-ion fragmentation involves production of O-, and it is dominated by complete dissociation of all molecular bonds. Negative-ion creation is most abundant at high-Rydberg resonances and just above the molecule's core-ionization potentials. The existence of four-body fragmentation channels evidences a strong charge redistribution in the molecule.

Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
96
issue
2
publisher
American Physical Society (APS)
external identifiers
  • scopus:85028674397
  • wos:000407096700003
ISSN
2469-9926
DOI
10.1103/PhysRevA.96.023409
language
English
LU publication?
yes
id
3bda369a-3dd2-4b5b-8fc6-1b7dd5c01165
date added to LUP
2017-09-27 10:38:40
date last changed
2018-01-16 13:27:03
@article{3bda369a-3dd2-4b5b-8fc6-1b7dd5c01165,
  abstract     = {<p>The negative-ion fragmentation of formic acid (HCOOH) is studied with negative- and positive-ion coincidence spectroscopy. We report four-body ionic fragmentation where up to three positive ions are collected in coincidence with one negative ion. We report yields for 21 three-body channels and five four-body channels. More than 80% of all negative-ion fragmentation involves production of O-, and it is dominated by complete dissociation of all molecular bonds. Negative-ion creation is most abundant at high-Rydberg resonances and just above the molecule's core-ionization potentials. The existence of four-body fragmentation channels evidences a strong charge redistribution in the molecule.</p>},
  articleno    = {023409},
  author       = {Stråhlman, Christian and Kivimäki, Antti and Richter, Robert and Sankari, Rami},
  issn         = {2469-9926},
  language     = {eng},
  month        = {08},
  number       = {2},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A},
  title        = {Negative- and positive-ion fragmentation of core-excited formic-acid molecules studied with three- and four-ion coincidence spectroscopy},
  url          = {http://dx.doi.org/10.1103/PhysRevA.96.023409},
  volume       = {96},
  year         = {2017},
}