University of Oulu

Stråhlman, C., Kivimäki, A., Richter, R., Sankari, R. (2017) Negative- and positive-ion fragmentation of core-excited formic-acid molecules studied with three- and four-ion coincidence spectroscopy. Physical Review A, 96 (2), doi:10.1103/PhysRevA.96.023409

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

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Author: Stråhlman, Christian1,2; Kivimäki, Antti3,4; Richter, Robert5;
Organizations: 1Malmö University
2Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
3Nano and Molecular Systems Research Unit, University of Oulu
4MAX IV Laboratory, Lund University
5Elettra–Sincrotrone Trieste
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.4 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe201710098922
Language: English
Published: American Physical Society, 2017
Publish Date: 2017-10-09
Description:

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.

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Series: Physical review A
ISSN: 2469-9926
ISSN-E: 2469-9934
ISSN-L: 2469-9926
Volume: 96
Issue: 2
Pages: 023409-1 - 023409-8
DOI: 10.1103/PhysRevA.96.023409
OADOI: https://oadoi.org/10.1103/PhysRevA.96.023409
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
116 Chemical sciences
Subjects:
Dataset Reference: Tabulated normalised intensities for all three- and four-body fragmentation channels.
  https://journals.aps.org/pra/supplemental/10.1103/PhysRevA.96.023409/FA_NIPIPICO_tables.pdf
Copyright information: ©2017 American Physical Society