Ionization and dissociation of N[sub 2] and CO in collisions with 2. 3[ital q]-keV Ar[sup [ital q]+] (8[le][ital q][le]14)
- Nuclear Science and Engineering Program, Ward Laboratory, Cornell University, Ithaca, New York 14853 (United States)
The charge-state and energy distribution of molecular ions and fragments produced in low-energy, highly-charged-argon-ion collisions with N[sub 2] and CO were measured. Ar[sup [ital q]+] (8[le][ital q][le]14) ions produced by an electron-beam ion source and extracted at 2.3 kV interacted with a molecular-target gas jet located in the ionization region of a time-of-flight spectrometer. The resulting molecular recoils and fragments were analyzed by time of flight. For a given molecular target, the measured spectra are all similar and do not depend on the incident argon-projectile charge state. The spectra are dominated by the singly charged ion, either N[sub 2][sup +] or CO[sup +]. The stable or long-lived metastable doubly charged molecular ion CO[sup 2+] is the second most prominent feature in Ar[sup [ital q]+] on the CO spectra. Similarly, N[sub 2][sup 2+], which cannot be distinguished from N[sup +], is also presumed to be present in Ar[sup [ital q]+] on the N[sub 2] spectra. The remaining peaks are associated with the dissociation of the N[sub 2][sup [ital Q]+] and CO[sup [ital Q]+] (2[le][ital Q][le]6) molecular ions formed in the collision. The peak positions correspond to fragments of a given mass-to-charge ratio and kinetic energy calculated assuming vertical target ionization.
- DOE Contract Number:
- FG02-86ER13519
- OSTI ID:
- 5405912
- Journal Information:
- Physical Review A; (United States), Vol. 49:1; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARGON IONS
ION-MOLECULE COLLISIONS
CARBON MONOXIDE
IONIZATION
NITROGEN
DISSOCIATION
KEV RANGE 10-100
KEV RANGE 100-1000
MULTICHARGED IONS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY RANGE
ION COLLISIONS
IONS
KEV RANGE
MOLECULE COLLISIONS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)