Issue |
Europhys. Lett.
Volume 49, Number 1, January I 2000
|
|
---|---|---|
Page(s) | 41 - 47 | |
Section | Atomic and molecular physics | |
DOI | https://doi.org/10.1209/epl/i2000-00117-6 | |
Published online | 01 September 2002 |
Molecular fragmentation by slow highly charged ion impact
1
University of Missouri-Rolla - Rolla, MO 65401, USA
2
KVI Atomic Physics, Rijksuniversiteit Groningen 9747AA Groningen, The Netherlands
Received:
3
June
1999
Accepted:
1
November
1999
An experimental and theoretical study is presented for fragmentation of D2 after double-electron removal by slow (1–20 kV) highly charged ion impact (Xe10+/19+ and O5+/6+). As the ratio of the charge state to speed of the incoming ion increases, the D+ fragment energies deviate significantly from those found for isolated-molecule Franck-Condon transitions between states of D2. Both higher and lower fragment energies are observed, in accordance with predictions based on a Classical Trajectory Monte Carlo model. These energies result from the collisional momentum transfer to the center of mass of the molecule combined with the normal two-body breakup of D+ + D+. At the lowest energies, theory predicts a deviation from this vector addition picture due to the high field of the slow projectile.
PACS: 34.50.Gb – Electronic excitation and ionization of molecules; intermediate molecular states (including lifetimes, state mixing, etc.) / 34.70.+e – Charge transfer / 82.30.Fi – Ion-molecule, ion-ion, and charge-transfer reactions
© EDP Sciences, 2000
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