Collisional broadening and shift coefficients for (n+1)s[3/2]2 → (n+1)p[1/2]1 argon and neon lines in parent and foreign rare gases

Abstract

Results of simultaneous measurements of pressure shift β and broadening ξ coefficients for 912.3 nm Ar and 703.2 nm Ne spectral lines of the (n+1)s[3/2]2 → (n+1)p[1/2]1 transition are presented. This is a lasing transition in a recently proposed optically pumped rare gas laser. Absorption line shapes fitted to Voigt profiles permitted to assess gas temperature by determining Doppler width components. These coefficients for the Ar 912.3 nm line with He and Ne as the collisional partners were determined for the first time. The values of shift and broadening coefficients in units of 10−10 s-1 cm3, reduced to 300 K are: βAr-Ar = -2.11±0.05, βAr-Ne = -1.21±0.05, βAr-He = 0.37±0.03, βNe-Ne = -0.78±0.05, βNe-He = 0.0±0.05; ξAr-Ar = 2.8±0.1, ξAr-Ne = 1.68±0.05, ξAr-He = 3.7±0.1, ξNe-Ne = 1.94±0.05, ξNe-He = 3.18±0.05.