Visualizing Recurrently Migrating Hydrogen in Acetylene Dication by Intense Ultrashort Laser Pulses

Journal Article · Fri Dec 21 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.258302· OSTI ID:21024622

Hishikawa, Akiyoshi ^[1]; Matsuda, Akitaka ^[1]; Fushitani, Mizuho; Takahashi, Eiji J ^[1]

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1. Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585 (Japan)

We demonstrate the visualization of ultrafast hydrogen migration in deuterated acetylene dication (C{sub 2}D{sub 2}{sup 2+}) by employing the pump-probe Coulomb explosion imaging with sub-10-fs intense laser pulses (9 fs, 0.13 PW/cm{sup 2}, 800 nm). It is shown, from the temporal evolution of the momenta of the fragment ions produced by the three-body explosion, C{sub 2}D{sub 2}{sup 3+}{yields}D{sup +}+C{sup +}+CD{sup +}, that the migration proceeds in a recurrent manner: The deuterium atom first shifts from one carbon site to the other in a short time scale ({approx}90 fs) and then migrates back to the original carbon site by 280 fs, in competition with the molecular dissociation.

• OSTI ID: 21024622
• Journal Information: Physical Review Letters, Vol. 99, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.99.258302; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACETYLENE
CARBON
DEUTERIUM
DISSOCIATION
EVOLUTION
EXPLOSIONS
HYDROGEN
LASERS
PULSES