Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

An experimental high pressure line shape study of the rubidium D1and D2transitions with the noble gases, methane, and ethane

Greg A. Pitz, Gordon D. Hager, Tiffany B. Tafoya, Joseph W. Young, Glen P. Perram, David A. Hostutler

Published Feb 25, 2014• 13 citations

Abstract

At high pressure the rst resonance lines of rubidium have been observed to broaden asymmetrically. A the- oretical line shape for this asymmetry has been determined via the Anderson-Talman theory and the impact approximation. The broadening and shift rates compared nicely to previous low pressure results and the rates for asymmetry have been measured for the noble gases, methane, and ethane.

DOI: 10.1117/12.2045337

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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

An experimental high pressure line shape study of the rubidium D1and D2transitions with the noble gases, methane, and ethane

Greg A. Pitz, Gordon D. Hager, Tiffany B. Tafoya, Joseph W. Young, Glen P. Perram, David A. Hostutler

Published Feb 25, 2014• 13 citations

Publisher

Abstract

DOI: 10.1117/12.2045337

Related papers

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Y. C. Chan, Jerry A. Gelbwachs

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High-resolution measurements of the pressure broadening and shift of the rubidium 5S1∕22–6P3∕22 line by argon and helium

Damir Aumiler, Ticijana Ban, Goran Pichler

We present results of the pressure broadening and shift of the rubidium $5s\phantom{\rule{0.2em}{0ex}}^{2}S_{1∕2}\text{--}6p\phantom{\rule{0.2em}{0ex}}^{2}P_{3∕2}$ (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.We present results of the pressure broadening and shift of the rubidium $5s\phantom{\rule{0.2em}{0ex}}^{2}S_{1∕2}\text{--}6p\phantom{\rule{0.2em}{0ex}}^{2}P_{3∕2}$ (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.

Physical Review ASep 30, 200417 citations

We studied the line shape of Rb

{D}_{1}

and

{D}_{2}

resonance lines in the presence of 1--10 amg of several gases:

{}^{3}

He,

{}^{4}

He, N

{}_{2}

, and Xe. We found that the line cores are well described by the asymmetric line shape expected for a van der Waals interatomic potential. The width and shift of the lines is proportional to the density of the foreign gas with high degree of accuracy, while the asymmetry is independent of the density. The constants of proportionality for pressure broadening and shift were measured with much higher accuracy than in previous experiments. We also studied the density dependence of the oscillator strength of the transitions.

^{2}P_{\frac{1}{2}}

component showed red, while the

^{2}P_{\frac{3}{2}}

component showed violet asymmetry. Both lines showed the proportionality of the width with

N

, the concentration of Rb atoms. The experimental width at half-maximum is greater than that predicted by Houston's theory by a factor of 1.5 and the width of the transition from

^{3}P_{\frac{3}{2}}

is greater than that from

^{3}P_{\frac{1}{2}}

by a factor of 1.6. A narrow diffuse band was observed near the shorter wave-length side of the

^{2}P_{\frac{1}{2}}

component and a similar one near the longer wave-length side of the

^{2}P_{\frac{3}{2}}

component.

We present results of the pressure broadening and shift of the rubidium

5s\phantom{\rule{0.2em}{0ex}}^{2}S_{1∕2}\text{--}6p\phantom{\rule{0.2em}{0ex}}^{2}P_{3∕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.