光谱学与光谱分析

PRESSURE BROADENING OF D_1 OF CS IN NOBLE GASES OF LOW PRESSURE

WU Zhenghu

Published Jan 1, 1995• 0 citations

Abstract

Using semiconductor laser of narrow line width, we obtain the absorption spectral profiles of D_1 (6S_1/2 → 6P_1/2) of Cs in a high magnetic field in different kinds and at different pressures of noble gases. It is shown that the broadening is linearly proportional to the foreign gas pressure lower than 1. 33 × 10￣4Pa in our experiment. We get coefficients of broadening by fitting to the Voigt profile.

Related papers

Extreme pressure broadening of three-photon resonances in noble gases

W. R. Ferrell, M. G. Payne, W. R. Garrett

Annual Meeting Optical Society of AmericaJan 1, 19851 citation

Pressure Effects of Cs Lines Due to a Mixture of Two Rare Gases

Shang-Yi Ch'en, Robert O. Garrett

Physical Review AJul 1, 19713 citations

Pressure broadening of Rb D 1 and D 2 lines by 3 He, 4 He, N 2 , and Xe: Line cores and near wings

M. V. Romalis, E. Miron, G. D. Cates

Physical Review ADec 1, 1997208 citations

Pressure broadening and frequency shift of the D1 and D2 lines of Rb and K in the presence of 3 He and N 2

K. A. Kluttz, Todd D. Averett, Brian A. Wolin

Physical Review AMar 25, 201340 citations

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

Physical Review AFeb 13, 200248 citations

Noble-gas broadening of the Li resonance line

Alan C. Gallagher

Physical Review AJul 1, 197539 citations

光谱学与光谱分析

PRESSURE BROADENING OF D_1 OF CS IN NOBLE GASES OF LOW PRESSURE

WU Zhenghu

Published Jan 1, 1995• 0 citations

OpenAlex

Abstract

Related papers

Extreme pressure broadening of three-photon resonances in noble gases

W. R. Ferrell, M. G. Payne, W. R. Garrett

A pressure-broadening study of three-photon and one-photon resonances was performed using counterpropagating, linearly polarized laser beams. Self-broadening, as well as the collision-induced effects due to the presence of a second noble gas, was investigated for the 6s, 6s′, 5d and 7s of xenon and the 5s′ of krypton. A multiphoton ionization scheme in a calibrated proportional counter is the basis of a new technique by which collisional processes can be investigated for high pressure regimes which have previously been inaccessible to investigation, particularly for self-broadening where the mean free path of the photons is of the order of 10−3 cm for pressures as low as 1 Torr. Using this technique, we have recorded the collision-induced widths and shifts of the resonance for pressures up to 1000 Torr. In the hundreds of torr range, asymmetric, self-broadening line shapes were observed with full widths and shifts which were greater than five times the laser bandwidth (0.002-0.005 nm).A pressure-broadening study of three-photon and one-photon resonances was performed using counterpropagating, linearly polarized laser beams. Self-broadening, as well as the collision-induced effects due to the presence of a second noble gas, was investigated for the 6s, 6s′, 5d and 7s of xenon and the 5s′ of krypton. A multiphoton ionization scheme in a calibrated proportional counter is the basis of a new technique by which collisional processes can be investigated for high pressure regimes which have previously been inaccessible to investigation, particularly for self-broadening where the mean free path of the photons is of the order of 10−3 cm for pressures as low as 1 Torr. Using this technique, we have recorded the collision-induced widths and shifts of the resonance for pressures up to 1000 Torr. In the hundreds of torr range, asymmetric, self-broadening line shapes were observed with full widths and shifts which were greater than five times the laser bandwidth (0.002-0.005 nm).

Annual Meeting Optical Society of AmericaJan 1, 19851 citation

Pressure Effects of Cs Lines Due to a Mixture of Two Rare Gases

Shang-Yi Ch'en, Robert O. Garrett

An experimental study of the additivity of the phase shift or perturbation energies produced by foreign-gas perturbers in collision with an optical atom is made by measuring the shift and the half-width of the second to the seventh doublet of the Cs absorption series, under various pressures and with various concentration ratios of a mixture of He and Ar. The shift produced by the mixture is found to be about the average of the shifts of the separate gases. The broadening of the fourth absorption doublet of Cs produced by the mixture of He and Ar is about $\frac{3}{4}$ of the sum of broadenings due to the constituents.An experimental study of the additivity of the phase shift or perturbation energies produced by foreign-gas perturbers in collision with an optical atom is made by measuring the shift and the half-width of the second to the seventh doublet of the Cs absorption series, under various pressures and with various concentration ratios of a mixture of He and Ar. The shift produced by the mixture is found to be about the average of the shifts of the separate gases. The broadening of the fourth absorption doublet of Cs produced by the mixture of He and Ar is about $\frac{3}{4}$ of the sum of broadenings due to the constituents.

Physical Review AJul 1, 19713 citations

Pressure broadening of Rb D 1 and D 2 lines by 3 He, 4 He, N 2 , and Xe: Line cores and near wings

M. V. Romalis, E. Miron, G. D. Cates

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.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.

Physical Review ADec 1, 1997208 citations

Pressure broadening and frequency shift of the D1 and D2 lines of Rb and K in the presence of 3 He and N 2

K. A. Kluttz, Todd D. Averett, Brian A. Wolin

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 ${D}_{2}$ .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 ${D}_{2}$.

Physical Review AMar 25, 201340 citations

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

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.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.

Physical Review AFeb 13, 200248 citations

Noble-gas broadening of the Li resonance line

Alan C. Gallagher

The normalized fluorescence spectrum of the Li 6708-\AA{} resonance line perturbed by the noble gases has been measured for 100 \AA{} either side of the resonance line, at a temperature of 400 \ifmmode\pm\else\textpm\fi{} 10\ifmmode^\circ\else\textdegree\fi{}C. The noble-gas pressure range of 100-1800 Torr was investigated. It was observed that the line wings scale linearly with this pressure for $2<|\ensuremath{\Delta}\ensuremath{\lambda}|<100$ \AA{}, and it was was demonstrated that a Lorentzianbroadened line core can be observed for this pressure range. The Li density was \ensuremath{\sim} ${10}^{10}$ / ${\mathrm{cm}}^{3}$ and was varied to establish the fluorescence spectrum in the limit of no radiation entrapment. The central region of the line has been measured with high resolution and compared to calculated profiles due to the various fine structure and isotopic line components, each broadened by a convolution of Lorentz, Doppler, and instrumental profiles. The shift and Lorentz broadening rates, as well as the wavelengths for transition to non-Lorentzian behavior, are reported. In contrast to the heavier alkali-metal-noble-gas cases, no distinctive far-wing features such as satellites or sharp inflections are observed. This is consistent with the much larger collision velocities for the Li case.The normalized fluorescence spectrum of the Li 6708-\AA{} resonance line perturbed by the noble gases has been measured for 100 \AA{} either side of the resonance line, at a temperature of 400 \ifmmode\pm\else\textpm\fi{} 10\ifmmode^\circ\else\textdegree\fi{}C. The noble-gas pressure range of 100-1800 Torr was investigated. It was observed that the line wings scale linearly with this pressure for $2<|\ensuremath{\Delta}\ensuremath{\lambda}|<100$ \AA{}, and it was was demonstrated that a Lorentzianbroadened line core can be observed for this pressure range. The Li density was \ensuremath{\sim} ${10}^{10}$/${\mathrm{cm}}^{3}$ and was varied to establish the fluorescence spectrum in the limit of no radiation entrapment. The central region of the line has been measured with high resolution and compared to calculated profiles due to the various fine structure and isotopic line components, each broadened by a convolution of Lorentz, Doppler, and instrumental profiles. The shift and Lorentz broadening rates, as well as the wavelengths for transition to non-Lorentzian behavior, are reported. In contrast to the heavier alkali-metal-noble-gas cases, no distinctive far-wing features such as satellites or sharp inflections are observed. This is consistent with the much larger collision velocities for the Li case.

Physical Review AJul 1, 197539 citations

\frac{3}{4}

of the sum of broadenings due to the constituents.

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.

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}

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.

{10}^{10}

{\mathrm{cm}}^{3}

and was varied to establish the fluorescence spectrum in the limit of no radiation entrapment. The central region of the line has been measured with high resolution and compared to calculated profiles due to the various fine structure and isotopic line components, each broadened by a convolution of Lorentz, Doppler, and instrumental profiles. The shift and Lorentz broadening rates, as well as the wavelengths for transition to non-Lorentzian behavior, are reported. In contrast to the heavier alkali-metal-noble-gas cases, no distinctive far-wing features such as satellites or sharp inflections are observed. This is consistent with the much larger collision velocities for the Li case.