Measurements of radiative charge-transfer reactions of doubly and singly charged rare-gas ions with rare-gas atoms at thermal energies

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.18.996· OSTI ID:7049366

Johnsen, R; Biondi, M A

Radiative charge-transfer coefficients for single-electron transfer between doubly or singly charged noble-gas ions and noble-gas atoms have been determined at thermal energy using a drift-tube mass-spectrometer apparatus. At 300 K, k (He/sup 2 +/ + He) = (4.8 +- 0.5) x 10/sup -14/ cm/sup 3//sec, with slightly smaller coefficients for the reactions Ne/sup 2 +/ + Ne, Ar/sup 2 +/ + Ar, Kr/sup 2 +/ + Kr, and Xe/sup 2 +/ + Xe. Differences in reactivity are found for the different, low-lying /sup 1/S, /sup 1/D, and /sup 3/P states of the doubly charged ions. A three-boby contribution to the radiative process is noted, with rate coefficients ranging between 10/sup -31/ and 10/sup -30/ cm/sup 6//sec at 300 K for the different noble-gas systems. The radiative charge-transfer coefficients for singly ionized ions are somewhat smaller, k (He/sup +/ + Ne) approx. 1 x 10/sup -15/ cm/sup 3//sec and k (Ne/sup +/ + Ar) approx. 6 x 10/sup -15/ cm/sup 3//sec at 300 K. The measured value of k (He/sup 2 +/ + He) is in reasonable agreement with the very recent theoretical calculations of Cohen and Bardsley.

• Research Organization: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
• OSTI ID: 7049366
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ARGON IONS
ATOM COLLISIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HELIUM
HELIUM IONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KRYPTON
KRYPTON IONS
MULTICHARGED IONS
NEON
NEON IONS
NONMETALS
RARE GASES
XENON
XENON IONS