Journal of Physics B Atomic and Molecular Physics

Hyperfine structures, lifetimes and collisional cross sections of some Rydberg D states of133Cs

Shun Nakayama, F. M. Kelly, George William Series

Published Mar 14, 1981• 17 citations

Abstract

Earlier experimental work on the n2D3/2 states of 133Cs has been extended to n=15 and 16. Hyperfine interaction constants and radiative lifetimes are found to follow the trends established for lower values of n, but the measured collisional cross sections are smaller than the extrapolated values.

DOI: 10.1088/0022-3700/14/5/016

Related papers

Lifetimes, depopulation cross sections and hyperfine structures of some Rydberg S and D states of133Cs

J. S. Deech, Robert Luypaert, Leslie Pendrill +1 more

Journal of Physics B Atomic and Molecular PhysicsApr 1, 197760 citations

Collisional cross-sections measurement of ultracold caesium Rydberg states

Zhigang Feng, Linjie Zhang, Hao Zhang +3 more

Europhysics Letters (EPL)Oct 1, 20108 citations

Collisional perturbation of caesium Rydberg states

Leslie Pendrill

Journal of Physics B Atomic and Molecular PhysicsSep 11, 197711 citations

Collisional depopulation of rubidium Rydberg states by ND3

L. Petitjean, F. Gounand, P. R. Fournier

Physical Review AFeb 1, 19869 citations

Studies of strongly interacting Rydberg systems

Robert Gavin Fields

Apr 1, 20210 citations

Hyperfine-structure measurements in the Rydberg S and P states of rubidium and cesium

John W. Farley, Pericles G. Tsekeris, R. Gupta

Physical Review AApr 1, 197728 citations

Journal of Physics B Atomic and Molecular Physics

Hyperfine structures, lifetimes and collisional cross sections of some Rydberg D states of133Cs

Shun Nakayama, F. M. Kelly, George William Series

Published Mar 14, 1981• 17 citations

Publisher

Abstract

DOI: 10.1088/0022-3700/14/5/016

Related papers

Lifetimes, depopulation cross sections and hyperfine structures of some Rydberg S and D states of133Cs

J. S. Deech, Robert Luypaert, Leslie Pendrill +1 more

Measurements have been made of time-resolved fluorescence from n 2 S 1/2 and n 2 D 3/2 states of 133 Cs (n=8 to 14) over a range of vapour densities covering the onset of collisional depopulation. Lifetimes for the free atom and depopulation cross sections are deduced. Lifetimes are proportional to (n*) x with x=2.52+or-0.06 (S states) and 2.62+or-0.06 (D 3/2 states). Cross sections are proportional to (n*) 4 . Hyperfine-structure interaction constants for the 2 D 3/2 states determined by the method of quantum beats agree with the recent results of Belin et al. (1976).Measurements have been made of time-resolved fluorescence from n 2 S 1/2 and n 2 D 3/2 states of 133 Cs (n=8 to 14) over a range of vapour densities covering the onset of collisional depopulation. Lifetimes for the free atom and depopulation cross sections are deduced. Lifetimes are proportional to (n*) x with x=2.52+or-0.06 (S states) and 2.62+or-0.06 (D 3/2 states). Cross sections are proportional to (n*) 4 . Hyperfine-structure interaction constants for the 2 D 3/2 states determined by the method of quantum beats agree with the recent results of Belin et al. (1976).

Journal of Physics B Atomic and Molecular PhysicsApr 1, 197760 citations

Collisional cross-sections measurement of ultracold caesium Rydberg states

Zhigang Feng, Linjie Zhang, Hao Zhang +3 more

We measure the total collisional cross-sections of caesium Rydberg nD ( n =37–40) states by measuring the corresponding effective decay rates versus Rydberg atoms density in a conventional magneto-optical trap using the state-selective pulse field ionization technique. The results indicate that the large collisional cross-sections mainly come from the contribution of Rydberg atoms interactions. We also obtain the spontaneous radiative lifetimes of different Rydberg states by fitting experimental data, which are in agreement with the existing theoretical values within experimental error.We measure the total collisional cross-sections of caesium Rydberg nD ( n =37–40) states by measuring the corresponding effective decay rates versus Rydberg atoms density in a conventional magneto-optical trap using the state-selective pulse field ionization technique. The results indicate that the large collisional cross-sections mainly come from the contribution of Rydberg atoms interactions. We also obtain the spontaneous radiative lifetimes of different Rydberg states by fitting experimental data, which are in agreement with the existing theoretical values within experimental error.

Europhysics Letters (EPL)Oct 1, 20108 citations

Collisional perturbation of caesium Rydberg states

Leslie Pendrill

Measurements of the time-resolved fluorescence from some highly excited states of 133Cs atoms (n2D3/2, n2D5/2 and n2S1/2(n-4)2F; n=9 to 15) have shown multi-exponential behaviour which depends on vapour pressure. This behaviour is the result of mixing of population caused by collisions between the excited and ground-state atoms. The variation of the exponential rate constants with vapour density yields the free-atom lifetimes and collisional transfer cross sections of these excited states. An analogy is drawn between this variation and that of the energy eigenvalues of an atom under external perturbation.Measurements of the time-resolved fluorescence from some highly excited states of 133Cs atoms (n2D3/2, n2D5/2 and n2S1/2(n-4)2F; n=9 to 15) have shown multi-exponential behaviour which depends on vapour pressure. This behaviour is the result of mixing of population caused by collisions between the excited and ground-state atoms. The variation of the exponential rate constants with vapour density yields the free-atom lifetimes and collisional transfer cross sections of these excited states. An analogy is drawn between this variation and that of the energy eigenvalues of an atom under external perturbation.

Journal of Physics B Atomic and Molecular PhysicsSep 11, 197711 citations

Collisional depopulation of rubidium Rydberg states by ND3

L. Petitjean, F. Gounand, P. R. Fournier

This paper reports the measurement of the depopulation cross sections of the Rb(ns) and Rb(nd) states by ${\mathrm{ND}}_{3}$ (23\ensuremath{\le}n\ensuremath{\le}50). The experimental data are discussed with reference to previous work done on collisions between Rb(ns) and Rb(nd) states and ${\mathrm{NH}}_{3}$ .This paper reports the measurement of the depopulation cross sections of the Rb(ns) and Rb(nd) states by ${\mathrm{ND}}_{3}$ (23\ensuremath{\le}n\ensuremath{\le}50). The experimental data are discussed with reference to previous work done on collisions between Rb(ns) and Rb(nd) states and ${\mathrm{NH}}_{3}$.

Physical Review AFeb 1, 19869 citations

Studies of strongly interacting Rydberg systems

Robert Gavin Fields

Rydberg atoms are increasingly being used as a means of introducing long-range, tunable interactions into atomic systems through their strong dipole-dipole interactions. When creating such interactions, however, there are a variety of potential effects that can occur, such as state (n and/or L) changing or Penning ionization, which can complicate the dynamics of the system. In the following work, such interactions are investigated for Rydberg-Rydberg collisions using very high-n, n ~300, strontium Rydberg atoms in an atomic beam configuration. By exploiting Rydberg blockade and the inherent distribution of atomic velocities present in an atomic beam, it is possible to create a 1D array of moving Rydberg atoms which will naturally overtake each other over time. Measurements of both Penning ionization and state changing for such collisions are made and compared with classical trajectory Monte-Carlo (CTMC) simulations, with both indicating large collisional cross sections on the order of 1 x 10-6 cm2 for Penning ionization and nearly 8 x 10-5 cm2 for state changing interactions. In a second series of experiments, previous work involving doubly-excited Rydberg states is expanded upon by investigating autoionization with high-n, L > 3, Rydberg states. Past research involving autoionization has shown that the effect is strongly L-dependent, with high-L states having significantly smaller autoionizing rates. To create well-defined, L > 3 states, the use of microwave fields to drive various high-n, n ~ 150, n1F3 → (n+1)1G4, (n+2)1H5 transitions is investigated, with spectroscopic measurements of these transitions providing quantum defect values for n1G4 and n1H5 states. These measurements provide a basis for future studies into the L-dependence of high-n, n ~ 300, autoionizing Rydberg atoms, with the eventual goal of creating a long-lived, doubly-excited “planetary” Rydberg state.Rydberg atoms are increasingly being used as a means of introducing long-range, tunable interactions into atomic systems through their strong dipole-dipole interactions. When creating such interactions, however, there are a variety of potential effects that can occur, such as state (n and/or L) changing or Penning ionization, which can complicate the dynamics of the system. In the following work, such interactions are investigated for Rydberg-Rydberg collisions using very high-n, n ~300, strontium Rydberg atoms in an atomic beam configuration. By exploiting Rydberg blockade and the inherent distribution of atomic velocities present in an atomic beam, it is possible to create a 1D array of moving Rydberg atoms which will naturally overtake each other over time. Measurements of both Penning ionization and state changing for such collisions are made and compared with classical trajectory Monte-Carlo (CTMC) simulations, with both indicating large collisional cross sections on the order of 1 x 10-6 cm2 for Penning ionization and nearly 8 x 10-5 cm2 for state changing interactions. In a second series of experiments, previous work involving doubly-excited Rydberg states is expanded upon by investigating autoionization with high-n, L > 3, Rydberg states. Past research involving autoionization has shown that the effect is strongly L-dependent, with high-L states having significantly smaller autoionizing rates. To create well-defined, L > 3 states, the use of microwave fields to drive various high-n, n ~ 150, n1F3 → (n+1)1G4, (n+2)1H5 transitions is investigated, with spectroscopic measurements of these transitions providing quantum defect values for n1G4 and n1H5 states. These measurements provide a basis for future studies into the L-dependence of high-n, n ~ 300, autoionizing Rydberg atoms, with the eventual goal of creating a long-lived, doubly-excited “planetary” Rydberg state.

Apr 1, 20210 citations

Hyperfine-structure measurements in the Rydberg S and P states of rubidium and cesium

John W. Farley, Pericles G. Tsekeris, R. Gupta

We have measured the hyperfine structure in many highly-excited $S$ and $P$ states of $^{87}\mathrm{Rb}$ and $^{133}\mathrm{Cs}$ . The results for the magnetic-dipole coupling constants are, in MHz, for $^{87}\mathrm{Rb}$ : $A(10^{2}S_{\frac{1}{2}})=56.3(2)$ , $A(11^{2}S_{\frac{1}{2}})=37.4(3)$ ; and for $^{133}\mathrm{Cs}$ : $A(9^{2}S_{\frac{1}{2}})=110.1(5)$ , $A(13^{2}S_{\frac{1}{2}})=18.4(1)$ , $A(14^{2}S_{\frac{1}{2}})=13.4(1)$ , $A(15^{2}S_{\frac{1}{2}})=10.1(1)$ , $A(16^{2}S_{\frac{1}{2}})=7.73(5)$ , $A(17^{2}S_{\frac{1}{2}})=6.06(10)$ , $A(10^{2}P_{\frac{1}{2}})=13.9(2)$ .We have measured the hyperfine structure in many highly-excited $S$ and $P$ states of $^{87}\mathrm{Rb}$ and $^{133}\mathrm{Cs}$. The results for the magnetic-dipole coupling constants are, in MHz, for $^{87}\mathrm{Rb}$: $A(10^{2}S_{\frac{1}{2}})=56.3(2)$, $A(11^{2}S_{\frac{1}{2}})=37.4(3)$; and for $^{133}\mathrm{Cs}$: $A(9^{2}S_{\frac{1}{2}})=110.1(5)$, $A(13^{2}S_{\frac{1}{2}})=18.4(1)$, $A(14^{2}S_{\frac{1}{2}})=13.4(1)$, $A(15^{2}S_{\frac{1}{2}})=10.1(1)$, $A(16^{2}S_{\frac{1}{2}})=7.73(5)$, $A(17^{2}S_{\frac{1}{2}})=6.06(10)$, $A(10^{2}P_{\frac{1}{2}})=13.9(2)$.

Physical Review AApr 1, 197728 citations

This paper reports the measurement of the depopulation cross sections of the Rb(ns) and Rb(nd) states by

{\mathrm{ND}}_{3}

(23\ensuremath{\le}n\ensuremath{\le}50). The experimental data are discussed with reference to previous work done on collisions between Rb(ns) and Rb(nd) states and

{\mathrm{NH}}_{3}

We have measured the hyperfine structure in many highly-excited

S

and

P

states of

^{87}\mathrm{Rb}

and

^{133}\mathrm{Cs}

. The results for the magnetic-dipole coupling constants are, in MHz, for

^{87}\mathrm{Rb}

A(10^{2}S_{\frac{1}{2}})=56.3(2)

A(11^{2}S_{\frac{1}{2}})=37.4(3)

; and for

^{133}\mathrm{Cs}

A(9^{2}S_{\frac{1}{2}})=110.1(5)

A(13^{2}S_{\frac{1}{2}})=18.4(1)

A(14^{2}S_{\frac{1}{2}})=13.4(1)

A(15^{2}S_{\frac{1}{2}})=10.1(1)

A(16^{2}S_{\frac{1}{2}})=7.73(5)

A(17^{2}S_{\frac{1}{2}})=6.06(10)

A(10^{2}P_{\frac{1}{2}})=13.9(2)