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Processes of quenching of 4,3He(21S, 21P) states in He+N2 mixture
Author(s): Emilia S. Dimova; G. M. Petrov; Kiril B. Blagoev
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Paper Abstract

The quenching process of He (21S, 21P) states by collisions with nitrogen molecules in a He+N2 mixture at low pressure is experimentally investigated by a time-resolved spectroscopy method combined with pulse electron excitation. The influence of nitrogen atoms in quenching process is taken into account. The rate constants and corresponding cross sections for quenching 4He(21S), 4He(21P), 3He(21S) and 3He(21P) states by collisions with ground state N2 molecules at Tg=600 K are: k[4He(21S)] = (2.7±0.1)x10-10 cm3s-1, k[4He(21P)] = (1.9±0.3)x10-9 cm3s-1, k[3He(21S)] = (2.8±0.1)x10-10 cm3s-1, and k[3He(21P)] = (3.2±0.6)x10-9 cm3s-1 and σ[4He(21S)] = (14.2±0.5)x10-16 cm2, σ[4He(21P)] = (100±16)x10-16 cm2, σ[4He(21S)] = (12.7±0.5)x10-16 cm2, and σ[4He(21P)] = (145±27)x10-16 cm2.

Paper Details

Date Published: 21 June 2004
PDF: 4 pages
Proc. SPIE 5449, Eighth International Conference on Laser and Laser Information Technologies, (21 June 2004); doi: 10.1117/12.563198
Show Author Affiliations
Emilia S. Dimova, Institute of Solid State Physics (Bulgaria)
G. M. Petrov, Naval Research Lab. (United States)
Kiril B. Blagoev, Institute of Solid State Physics (Bulgaria)

Published in SPIE Proceedings Vol. 5449:
Eighth International Conference on Laser and Laser Information Technologies
Vladislav Ya. Panchenko; Nikola V. Sabotinov, Editor(s)

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