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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)
DOI:https://doi.org/10.1063/1.325298· OSTI ID:7094237
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