Physical Review A

Inert-gas collisional broadening and shifts of Rb Rydberg states

W.-Ü L. Tchang-Brillet, Alan C. Gallagher

Published Sep 1, 1980• 42 citations

Abstract

The broadening and shift of several Rb $3S\ensuremath{-}\mathrm{nS}$ and $3S\ensuremath{-}\mathrm{nD}$ transitions perturbed by inert gases have been measured by Doppler-free two-photon absorption and fluorescence detection. The measured shifts are in reasonable agreement with the theoretical predictions, whereas the measured broadening rates are found to be much larger.

DOI: 10.1103/physreva.22.1012

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Physical Review A

Inert-gas collisional broadening and shifts of Rb Rydberg states

W.-Ü L. Tchang-Brillet, Alan C. Gallagher

Published Sep 1, 1980• 42 citations

Publisher

Abstract

The broadening and shift of several Rb

3S\ensuremath{-}\mathrm{nS}

and

3S\ensuremath{-}\mathrm{nD}

transitions perturbed by inert gases have been measured by Doppler-free two-photon absorption and fluorescence detection. The measured shifts are in reasonable agreement with the theoretical predictions, whereas the measured broadening rates are found to be much larger.

DOI: 10.1103/physreva.22.1012

Related papers

Pressure shifts and broadenings of Rb Rydberg states by Ne, Kr, and H2

Douglas C. Thompson, E. Kammermayer, Boris Peter Stoicheff +1 more

Broadening and shift rates for Rb $^{2}\mathrm{S}$ and $^{2}\mathrm{D}$ Rydberg states with principal quantum number n\ensuremath{\sim}10--50 have been measured for Ne, Kr, and ${\mathrm{H}}_{2}$ perturbers, using the technique of Doppler-free two-photon spectroscopy. From the shift rates at high n, we derived electron scattering lengths of (0.24\ifmmode\pm\else\textpm\fi{}0.01) ${a}_{0}$ for Ne, (-4.0\ifmmode\pm\else\textpm\fi{}0.3) ${a}_{0}$ for Kr, and (1.64\ifmmode\pm\else\textpm\fi{}0.07) ${a}_{0}$ for ${\mathrm{H}}_{2}$ . For Ne and Kr, these are in good agreement with other experimental values. Also, the n dependence of broadening and shift rates follows theoretical predictions for Ne and Kr, but not for ${\mathrm{H}}_{2}$ .Broadening and shift rates for Rb $^{2}\mathrm{S}$ and $^{2}\mathrm{D}$ Rydberg states with principal quantum number n\ensuremath{\sim}10--50 have been measured for Ne, Kr, and ${\mathrm{H}}_{2}$ perturbers, using the technique of Doppler-free two-photon spectroscopy. From the shift rates at high n, we derived electron scattering lengths of (0.24\ifmmode\pm\else\textpm\fi{}0.01)${a}_{0}$ for Ne, (-4.0\ifmmode\pm\else\textpm\fi{}0.3)${a}_{0}$ for Kr, and (1.64\ifmmode\pm\else\textpm\fi{}0.07)${a}_{0}$ for ${\mathrm{H}}_{2}$. For Ne and Kr, these are in good agreement with other experimental values. Also, the n dependence of broadening and shift rates follows theoretical predictions for Ne and Kr, but not for ${\mathrm{H}}_{2}$.

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Douglas C. Thompson, E. Weinberger, Guoqing Xu +1 more

The technique of Doppler-free two-photon spectroscopy was used to measure rates for line broadenings and frequency shifts of Rydberg levels with pressure. Measurements were made of spectra of $^{2}\mathrm{S}$ and $^{2}\mathrm{D}$ states (with n\ensuremath{\sim}10--40) for ${\mathrm{Rb}}^{\mathrm{*}\mathrm{*}}$ +Rb and ${\mathrm{K}}^{\mathrm{*}\mathrm{*}}$ +K, and of $^{2}\mathrm{S}$ states (with n=14--29) for ${\mathrm{K}}^{\mathrm{*}\mathrm{*}}$ +Rb. Large oscillations are observed in both broadening and shift rates for n\ensuremath{\sim}20--30 in all series except for the $^{2}\mathrm{D}$ series in ${\mathrm{Rb}}^{\mathrm{*}\mathrm{*}}$ +Rb. Overall rates for broadening and shift are compared with a theory based on the ``free-electron'' model. The observed oscillations are inconsistent with theories based on the resonance scattering of the Rydberg electron by the perturbing atom. A possible alternative mechanism related to interference in l-mixing collisions is suggested.The technique of Doppler-free two-photon spectroscopy was used to measure rates for line broadenings and frequency shifts of Rydberg levels with pressure. Measurements were made of spectra of $^{2}\mathrm{S}$ and $^{2}\mathrm{D}$ states (with n\ensuremath{\sim}10--40) for ${\mathrm{Rb}}^{\mathrm{*}\mathrm{*}}$+Rb and ${\mathrm{K}}^{\mathrm{*}\mathrm{*}}$+K, and of $^{2}\mathrm{S}$ states (with n=14--29) for ${\mathrm{K}}^{\mathrm{*}\mathrm{*}}$+Rb. Large oscillations are observed in both broadening and shift rates for n\ensuremath{\sim}20--30 in all series except for the $^{2}\mathrm{D}$ series in ${\mathrm{Rb}}^{\mathrm{*}\mathrm{*}}$+Rb. Overall rates for broadening and shift are compared with a theory based on the ``free-electron'' model. The observed oscillations are inconsistent with theories based on the resonance scattering of the Rydberg electron by the perturbing atom. A possible alternative mechanism related to interference in l-mixing collisions is suggested.

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Collisional shifts and broadenings of doubly excited states of barium

M. Marafi, Z Suji, K. S. Bhatia +1 more

Shift and broadening parameters for doubly excited states of 5d6d, 5d7d, 5d7s, 5d8s and 6p 2 configurations in neutral barium atoms are presented. A tunable dye laser pumped by an excimer laser was used to populate the Rydberg states of Ba by two-photon absorption from the 6s 2 1 S 0 ground state. Inert gases Ar, Kr and Xe at 100 mbar pressure were used as perturbing gases. The resulting line shapes were fitted to a Voigt line shape function, from which shift and broadening parameters were inferred.Shift and broadening parameters for doubly excited states of 5d6d, 5d7d, 5d7s, 5d8s and 6p 2 configurations in neutral barium atoms are presented. A tunable dye laser pumped by an excimer laser was used to populate the Rydberg states of Ba by two-photon absorption from the 6s 2 1 S 0 ground state. Inert gases Ar, Kr and Xe at 100 mbar pressure were used as perturbing gases. The resulting line shapes were fitted to a Voigt line shape function, from which shift and broadening parameters were inferred.

Journal of Physics B Atomic Molecular and Optical PhysicsOct 1, 20087 citations

The broadening and shift of several Rb

3S\ensuremath{-}\mathrm{nS}

and

3S\ensuremath{-}\mathrm{nD}

Broadening and shift rates for Rb

^{2}\mathrm{S}

and

^{2}\mathrm{D}

Rydberg states with principal quantum number n\ensuremath{\sim}10--50 have been measured for Ne, Kr, and

{\mathrm{H}}_{2}

perturbers, using the technique of Doppler-free two-photon spectroscopy. From the shift rates at high n, we derived electron scattering lengths of (0.24\ifmmode\pm\else\textpm\fi{}0.01)

{a}_{0}

for Ne, (-4.0\ifmmode\pm\else\textpm\fi{}0.3)

{a}_{0}

for Kr, and (1.64\ifmmode\pm\else\textpm\fi{}0.07)

{a}_{0}

for

{\mathrm{H}}_{2}

. For Ne and Kr, these are in good agreement with other experimental values. Also, the n dependence of broadening and shift rates follows theoretical predictions for Ne and Kr, but not for

{\mathrm{H}}_{2}

The technique of Doppler-free two-photon spectroscopy was used to measure rates for line broadenings and frequency shifts of Rydberg levels with pressure. Measurements were made of spectra of

^{2}\mathrm{S}

and

^{2}\mathrm{D}

states (with n\ensuremath{\sim}10--40) for

{\mathrm{Rb}}^{\mathrm{*}\mathrm{*}}

+Rb and

{\mathrm{K}}^{\mathrm{*}\mathrm{*}}

+K, and of

^{2}\mathrm{S}

states (with n=14--29) for

{\mathrm{K}}^{\mathrm{*}\mathrm{*}}

+Rb. Large oscillations are observed in both broadening and shift rates for n\ensuremath{\sim}20--30 in all series except for the

^{2}\mathrm{D}

series in

{\mathrm{Rb}}^{\mathrm{*}\mathrm{*}}

+Rb. Overall rates for broadening and shift are compared with a theory based on the ``free-electron'' model. The observed oscillations are inconsistent with theories based on the resonance scattering of the Rydberg electron by the perturbing atom. A possible alternative mechanism related to interference in l-mixing collisions is suggested.