Processes of quenching of 4,3He(21S,21P) states in He+N2 mixture

Emilia S. Dimova; G. M. Petrov; Kiril B. Blagoev

doi:10.1117/12.563198

21 June 2004 Processes of quenching of ^4,3He(2¹S, 2¹P) states in He+N₂ mixture

Emilia S. Dimova, G. M. Petrov, Kiril B. Blagoev

Proceedings Volume 5449, Eighth International Conference on Laser and Laser Information Technologies; (2004) https://doi.org/10.1117/12.563198
Event: Eighth International Conference on Laser and Laser Information Technologies, 2003, Smolyan, Bulgaria

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 T_g=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.

Citation Download Citation

Emilia S. Dimova, G. M. Petrov, and Kiril B. Blagoev "Processes of quenching of ^4,3He(2¹S, 2¹P) states in He+N₂ mixture", Proc. SPIE 5449, Eighth International Conference on Laser and Laser Information Technologies, (21 June 2004); https://doi.org/10.1117/12.563198

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