Measurement of pressure shift and broadening for Ar and Kr 4s[3/2]2 → 4p[5/2]3 transition in rare gases using diode-laser spectroscopy

Abstract In this work simultaneous measurements of pressure broadening and shift coefficients for 811.5 nm Ar and 811.3 nm Kr spectral lines of the 4s[3/2] 2  → 4p[5/2] 3 transition were performed. Assessment of gas temperature was done by determining Doppler width components of the lines’ Voigt profiles. Pressure shift coefficients for the mixtures Ar:Ne, Kr:Ne and Kr:Ar were determined for the first time. Their values in units of 10 -10  s -1 cm 3 , reduced to 300 K are: β Ar:Ne = -0.51 ± 0.05, β Kr:Ne = -0.65 ± 0.01, β Kr:Ar = -2.07 ± 0.08. Additionally we demonstrated the use of easily available starters for fluorescent lamps as sealed Ar discharge cells for reference optical frequency.