Strong-field double ionization of formic acid leading to hydrogen elimination and multi-body fragmentation
ORAL
Abstract
We examine multibody fragmentation of formic acid dications, produced by ultrashort intense laser pulses, using coincidence momentum imaging and deuterium tagging to distinguish the hydrogen sites. Our measurements indicate that double hydrogen elimination leads to 3- and 4-body breakup, specifically H + D + CO22+ and H + D + O+ + CO+, respectively. The latter breakup channel, which undergoes sequential fragmentation, also proceeds via the same metastable dication, CO22+, but with shorter lifetimes than the CO22+ dications detected intact. This intriguing sequential breakup is identified using native frames analysis. Simulations are needed to confirm the signature of the sequential process because of the inferior momentum resolution of breakup channels for which not all fragments are detected.
*The J.R. Macdonald Laboratory personnel and equipment are supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Science, Office of Science, US Department of Energy under grant number DE-FG02-86ER13491. SB was supported by grant number DE-SC0020276 and KB by grant number DE-SC0019451 from the same funding agency. Augustana University personnel and equipment are supported by National Science Foundation grant PHY-2309192.
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Presenters
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Eric Wells
- Augustana University