Kinetic-energy release in the dissociative capture-ionization of CO molecules by 97-MeV Ar{sup 14+} ions
- Cyclotron Institute and Department of Chemistry, Texas A&M University, College Station, Texas 77843 (United States)
The dissociation of CO{sup {ital Q}+} molecular ions ({ital Q}=4 to 9) produced in multiply ionizing collisions accompanied by the transfer of an electron to the projectile has been studied using time-of-flight techniques. Analysis of the coincident-ion-pair flight-time-difference distributions yielded average values of the kinetic-energy releases for the various dissociation reactions. These values were found to be as much as a factor of 2 greater than the kinetic-energy releases expected for dissociation along Coulombic potential curves. The average kinetic-energy release observed for a given ion pair with charges {ital q}{sub 1} and {ital q}{sub 2} are nearly equal to the point-charge Coulomb potential energies for an ion pair with charges {ital q}{sub 1}+1 and {ital q}{sub 2}+1, suggesting that the parent molecular ion is formed with two electrons, on average, in highly excited states that do not contribute to the screening of the nuclei. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 279455
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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