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)

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.321· OSTI ID:5405912

Vancura, J; Kostroun, V O ^[1]

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1. 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), Journal Name: Physical Review A; (United States) Vol. 49:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
DISSOCIATION
ELEMENTS
ENERGY RANGE
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
MOLECULE COLLISIONS
MULTICHARGED IONS
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS