Collisional quenching of Xe/sup +/(/sup 2/P) and He 2/sup 3/S metastables by calcium and strontium metal vapors
Journal Article
·
· J. Appl. Phys.; (United States)
Excitation-transfer cross sections have been measured for Penning and charge-transfer reactions in He-Ca, He-Sr, Xe-Ca, and Xe-Sr discharges. In low-current low-pressure discharges of helium, excitation transfer to ionic levels of calcium and strontium was found to be dominated by collisions with 2/sup 3/S helium metastables with measured cross section sigma (He 2/sup 3/S--Ca) =4.1 x 10/sup -/15 cm/sup 2/ and sigma (He 2/sup 3/S--Sr) =1.6 x 10/sup -/15 cm/sup 2/. In xenon discharges, charge-transfer cross sections between xenon ions and calcium and strontium atoms, sigma (Xe/sup +/-Ca) and sigma (Xe/sup +/-Sr), were measured to be 2.2 x 10/sup -/16 and 2.3 x 10/sup -/16 cm/sup 2/, respectively.
- Research Organization:
- Department of Electrical Engineering, Colorado State University, Fort Collins, Colorado 80523
- OSTI ID:
- 7094237
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:6; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
CALCIUM
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRIC DISCHARGES
ELECTRON TRANSFER
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GAS LASERS
HEAT TREATMENTS
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
LASERS
METALS
METASTABLE STATES
NONMETALS
QUENCHING
RARE GASES
STRONTIUM
XENON IONS
420300* -- Engineering-- Lasers-- (-1989)
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
CALCIUM
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRIC DISCHARGES
ELECTRON TRANSFER
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GAS LASERS
HEAT TREATMENTS
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
LASERS
METALS
METASTABLE STATES
NONMETALS
QUENCHING
RARE GASES
STRONTIUM
XENON IONS