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High-resolution measurements of the pressure broadening and shift of the rubidium 5 2S1/2 - 6 2P3/2 line by argon and helium

We present results of the pressure broadening and shift of the rubidium 5s 2S1/2 - 6p 2P3/2 (420.2 nm) spectral line by argon and helium buffer gases at pressures below 10 torr. High-resolution absorption measurements were performed with a single-mode external cavity diode laser, having 20-GHz tuning range and a linewidth of about 1 MHz. Pressure broadening and shift parameters of Lorentzian hyperfine components have been determined. We obtained the redshift of hyperfine spectral lines for He and the blueshift for Ar.

Pressure broadening and shift; high-resolution spectroscopy of rubidium

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