Physical Review A

High-resolution measurement of the pressure broadening and shift of the Cs D1 and D2 lines by N2 and He buffer gases

A. Andalkar, Richard B. Warrington

Published Feb 13, 2002• 48 citations

Abstract

We have measured the pressure broadening and shift of the cesium $D1$ (894 nm) and $D2$ (852 nm) lines by nitrogen and helium buffer gases at pressures of 0--160 Torr using high-resolution spectroscopy with tunable external-cavity diode lasers. This measurement has a precision of about 1%, which significantly improves upon previously published measurements for the Cs $D1$ and $D2$ lines in ${\mathrm{N}}_{2}$ and He buffer gases.

DOI: 10.1103/physreva.65.032708

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Physical Review A

High-resolution measurement of the pressure broadening and shift of the Cs D1 and D2 lines by N2 and He buffer gases

A. Andalkar, Richard B. Warrington

Published Feb 13, 2002• 48 citations

Publisher

Abstract

We have measured the pressure broadening and shift of the cesium

D1

(894 nm) and

D2

(852 nm) lines by nitrogen and helium buffer gases at pressures of 0--160 Torr using high-resolution spectroscopy with tunable external-cavity diode lasers. This measurement has a precision of about 1%, which significantly improves upon previously published measurements for the Cs

D1

and

D2

lines in

{\mathrm{N}}_{2}

and He buffer gases.

DOI: 10.1103/physreva.65.032708

Related papers

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.

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E. W. Weber

Accurate values for the density shift and broadening of five isolated ${\mathrm{H}}_{\ensuremath{\alpha}}$ fine-structure transitions have been measured. Doppler-free polarization and double-quantum saturation spectroscopy with a cw dye laser are used in a He dc discharge with 1% ${\mathrm{H}}_{2}$ . The negative shifts and the huge broadening values are correctly predicted by an impact-approximation theory taking into account the large cross sections for fine-structure transfer (quenching) collisions and only Van der Waals interaction between ${\mathrm{H}}^{*}$ and He. Consequences of a comparison with the positive shift of the unresolved ${\mathrm{H}}_{\ensuremath{\alpha}}$ line and of the alkali-metal $D$ lines in He buffer gas are discussed. For pressures below 0.1 Torr hfs decoupling collisions give rise to a positive shift of single ${\mathrm{H}}_{\ensuremath{\alpha}}$ fine-structure lines and to a collisional narrowing effect analogous to that observed in nuclear magnetic resonance.Accurate values for the density shift and broadening of five isolated ${\mathrm{H}}_{\ensuremath{\alpha}}$ fine-structure transitions have been measured. Doppler-free polarization and double-quantum saturation spectroscopy with a cw dye laser are used in a He dc discharge with 1% ${\mathrm{H}}_{2}$. The negative shifts and the huge broadening values are correctly predicted by an impact-approximation theory taking into account the large cross sections for fine-structure transfer (quenching) collisions and only Van der Waals interaction between ${\mathrm{H}}^{*}$ and He. Consequences of a comparison with the positive shift of the unresolved ${\mathrm{H}}_{\ensuremath{\alpha}}$ line and of the alkali-metal $D$ lines in He buffer gas are discussed. For pressures below 0.1 Torr hfs decoupling collisions give rise to a positive shift of single ${\mathrm{H}}_{\ensuremath{\alpha}}$ fine-structure lines and to a collisional narrowing effect analogous to that observed in nuclear magnetic resonance.

Physical Review ADec 1, 197929 citations

We have measured the pressure broadening and shift of the cesium

D1

(894 nm) and

D2

D1

and

D2

lines in

{\mathrm{N}}_{2}

and He buffer gases.

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 report the results of a study of the pressure broadening and resonant frequency shift of the absorption profiles of the

{D}_{1}

and

{D}_{2}

lines of Rb and K in the presence of

{}^{3}

He and N

{}_{2}

gases over a range of number densities. We have also examined the temperature dependence of the broadening and shift over a range of approximately 340 to 400 K. We compare our results for the broadening and shift coefficients for Rb

{D}_{1}

and

{D}_{2}

to current values and present coefficients for K

{D}_{1}

and

{D}_{2}

{\mathrm{H}}_{2}

. The negative shifts and the huge broadening values are correctly predicted by an impact-approximation theory taking into account the large cross sections for fine-structure transfer (quenching) collisions and only Van der Waals interaction between

{\mathrm{H}}^{*}

and He. Consequences of a comparison with the positive shift of the unresolved ${\mathrm{H}}_{\ensuremath{\alpha}}$ line and of the alkali-metal

D

lines in He buffer gas are discussed. For pressures below 0.1 Torr hfs decoupling collisions give rise to a positive shift of single ${\mathrm{H}}_{\ensuremath{\alpha}}$ fine-structure lines and to a collisional narrowing effect analogous to that observed in nuclear magnetic resonance.