Ion-coincidence momentum imaging of three-body Coulomb explosion of formaldehyde in ultrashort intense laser fields

M. Fushitani, Chien-Ming Tseng, A. Matsuda, A. Hishikawa*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Three-body Coulomb explosion of formaldehyde (H2CO) in intense 7- and 35-fs laser fields (1.3 × 1015 W/cm2) has been investigated by using ion-coincidence momentum imaging technique. Two types of explosion pathways from the triply charged state, H2CO3+ → (i) H+ + H+ + CO+ and (ii) H+ + CH+ + O+, have been identified. It is shown from the momentum correlation of the fragment ions of pathway (i), that the geometrical structure of the molecule is essentially frozen along the H-C-H bending coordinate for the 7-fs case. On the other hand, for a longer pulse duration (35 fs), structural deformation along the C-H stretching and H-C-H bending coordinates is identified, which is ascribed to the nuclear dynamics in the dication states populated within the laser pulse duration.

Original languageEnglish
Title of host publicationInternational Conference of Computational Methods in Sciences and Engineering 2015, ICCMSE 2015
EditorsZacharoula Kalogiratou, Theodore E. Simos, Theodore Monovasilis, Theodore E. Simos, Theodore E. Simos
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413498
DOIs
StatePublished - 31 Dec 2015
EventInternational Conference of Computational Methods in Sciences and Engineering 2015, ICCMSE 2015 - Athens, Greece
Duration: 20 Mar 201523 Mar 2015

Publication series

NameAIP Conference Proceedings
Volume1702
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Conference of Computational Methods in Sciences and Engineering 2015, ICCMSE 2015
CountryGreece
CityAthens
Period20/03/1523/03/15

Keywords

  • Coulomb explosion
  • Intense laser fields
  • Ion-coincidence momentum imaging

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