Issue 45, 2022

Two- and three-body fragmentation of multiply charged tribromomethane by ultrafast laser pulses

Abstract

We investigate the two- and three-body fragmentation of tribromomethane (bromoform, CHBr3) resulting from multiple ionization by 28-femtosecond near-infrared laser pulses with a peak intensity of 6 × 1014 W cm−2. The analysis focuses on channels consisting exclusively of ionic fragments, which are measured by coincidence momentum imaging. The dominant two-body fragmentation channel is found to be Br+ + CHBr2+. Weaker HBr+ + CBr2+, CHBr+ + Br2+, CHBr2+ + Br2+, and Br+ + CHBr22+ channels, some of which require bond rearrangement prior to or during the fragmentation, are also observed. The dominant three-body fragmentation channel is found to be Br+ + Br+ + CHBr+. This channel includes both concerted and sequential fragmentation pathways, which we identify using the native frames analysis method. We compare the measured kinetic energy release and momentum correlations with the results of classical Coulomb explosion simulations and discuss the possible isomerization of CHBr3 to BrCHBr–Br (iso-CHBr3) prior to the fragmentation.

Graphical abstract: Two- and three-body fragmentation of multiply charged tribromomethane by ultrafast laser pulses

Supplementary files

Article information

Article type
Paper
Submitted
07 Jul 2022
Accepted
25 Oct 2022
First published
27 Oct 2022

Phys. Chem. Chem. Phys., 2022,24, 27631-27644

Two- and three-body fragmentation of multiply charged tribromomethane by ultrafast laser pulses

S. Bhattacharyya, K. Borne, F. Ziaee, S. Pathak, E. Wang, A. S. Venkatachalam, N. Marshall, K. D. Carnes, C. W. Fehrenbach, T. Severt, I. Ben-Itzhak, A. Rudenko and D. Rolles, Phys. Chem. Chem. Phys., 2022, 24, 27631 DOI: 10.1039/D2CP03089F

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