Ion-induced dissociation dynamics of acetylene

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.77.022708· OSTI ID:21140491

De, Sankar ^[1]; Rajput, Jyoti; Roy, A; Safvan, C P ^[1]; Ghosh, P N ^[2]

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1. Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi-110067 (India)
2. Department of Physics, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata-700009 (India)

We report on the results of dissociation dynamics of multiple charged acetylene molecules formed in collision with 1.2 MeV Ar{sup 8+} projectiles. Using the coincidence map, we can separate out the different dissociation pathways between carbon and hydrogen ionic fragments as well as complete two-body breakup events. From the measured slopes of the coincidence islands for carbon atomic fragments and theoretical values determined from the charge and momentum distribution of the correlated particles, we observe a diatom like behavior of the C-C charged complex during dissociation of multiply charged C{sub 2}H{sub 2}. We conclude that this behavior in breakup dynamics is a signature of sequentiality in dissociation of this multiply charged molecular species. The shape and orientation of the islands give further information about the momentum balance in the fragmentation process of two- or many-body dissociation pathways. Kinetic energy release of different breakup channels are reported here and compared with values calculated from the pure Coulomb explosion model.

• OSTI ID: 21140491
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
ARGON IONS
CARBON
COLLISIONS
DIATOMS
DISSOCIATION
DISTRIBUTION
EXPLOSIONS
FRAGMENTATION
HYDROGEN
IONS
KINETIC ENERGY
MEV RANGE 01-10
MOLECULES
MULTICHARGED IONS
REACTION KINETICS
TWO-BODY PROBLEM