arXiv:1912.10089 · Physical Review A

Lifetime measurement of the cesium 5D5/22 state

Sebastian Pucher, Philipp Schneeweiß, Arno Rauschenbeutel, Alexandre Dareau

Published Apr 27, 2020• 18 citations

Abstract

We measure the lifetime of the cesium $5^{2}D_{5/2}$ state using a time-resolved single-photon-counting method. We excite atoms in a hot vapor cell via an electric quadrupole transition at a wavelength of 685 nm and record the fluorescence of a cascade decay at a wavelength of 852 nm. We extract a lifetime of $1353(5)$ ns for the $5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}$ state, in agreement with a recent theoretical prediction. In particular, the observed lifetime is consistent with the literature values of the polarizabilities of the cesium $6P$ states. Our measurement contributes to resolving a long-standing disagreement between a number of experimental and theoretical results.

DOI: 10.1103/physreva.101.042510

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arXiv:1912.10089 · Physical Review A

Lifetime measurement of the cesium 5D5/22 state

Sebastian Pucher, Philipp Schneeweiß, Arno Rauschenbeutel, Alexandre Dareau

Published Apr 27, 2020• 18 citations

arXiv HTML PDF

Abstract

We measure the lifetime of the cesium

5^{2}D_{5/2}

state using a time-resolved single-photon-counting method. We excite atoms in a hot vapor cell via an electric quadrupole transition at a wavelength of 685 nm and record the fluorescence of a cascade decay at a wavelength of 852 nm. We extract a lifetime of

1353(5)

ns for the

5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}

state, in agreement with a recent theoretical prediction. In particular, the observed lifetime is consistent with the literature values of the polarizabilities of the cesium

6P

states. Our measurement contributes to resolving a long-standing disagreement between a number of experimental and theoretical results.

DOI: 10.1103/physreva.101.042510

Related papers

Lifetime measurements of cesium 5d2D5/2,3/2 and 11s2S1/2 states using pulsed-laser excitation

Diana DiBerardino, Carol E. Tanner, A. Sieradzan

We report measurements of the $5d{}^{2}{D}_{5/2},$ $5d{}^{2}{D}_{3/2},$ and $11s{}^{2}{S}_{1/2}$ state lifetimes in the ${}^{133}$ Cs atom to be 1281(9), 909(15), and 351(4) ns, respectively. A pulsed-dye laser selectively excites atomic Cs from the ground state, via a single-photon quadrupole transition, to the $5d$ states and, via a two-photon electric dipole transition, to the $11s$ state. A spectrometer-photomultiplier system detects the fluorescence from the decay of interest and a digitizing oscilloscope records the direct output of the photomultiplier. The data are fit to an exponential function to yield a value for the mean lifetime of the selected state.We report measurements of the $5d{}^{2}{D}_{5/2},$ $5d{}^{2}{D}_{3/2},$ and $11s{}^{2}{S}_{1/2}$ state lifetimes in the ${}^{133}$Cs atom to be 1281(9), 909(15), and 351(4) ns, respectively. A pulsed-dye laser selectively excites atomic Cs from the ground state, via a single-photon quadrupole transition, to the $5d$ states and, via a two-photon electric dipole transition, to the $11s$ state. A spectrometer-photomultiplier system detects the fluorescence from the decay of interest and a digitizing oscilloscope records the direct output of the photomultiplier. The data are fit to an exponential function to yield a value for the mean lifetime of the selected state.

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We present a direct lifetime measurement of the $5s5p{\phantom{\rule{0.16em}{0ex}}}^{1}{P}_{1}$ state of strontium using time-correlated single-photon counting of laser-induced fluorescence in a hot atomic beam. To achieve fast switch-off times and a high signal-to-noise ratio, we excite the strontium atoms with a femtosecond pulsed laser at approximately 461 nm and collect the fluorescence onto a hybrid single-photon detector. Analysis of the measured exponential decay gives a lifetime of the ${}^{1}{P}_{1}$ state of $\ensuremath{\tau}=(5.216\ifmmode\pm\else\textpm\fi{}0.{006}_{\text{stat}}\ifmmode\pm\else\textpm\fi{}0.{013}_{\text{sys}})$ ns, where all the systematic effects have been thoroughly considered.We present a direct lifetime measurement of the $5s5p{\phantom{\rule{0.16em}{0ex}}}^{1}{P}_{1}$ state of strontium using time-correlated single-photon counting of laser-induced fluorescence in a hot atomic beam. To achieve fast switch-off times and a high signal-to-noise ratio, we excite the strontium atoms with a femtosecond pulsed laser at approximately 461 nm and collect the fluorescence onto a hybrid single-photon detector. Analysis of the measured exponential decay gives a lifetime of the ${}^{1}{P}_{1}$ state of $\ensuremath{\tau}=(5.216\ifmmode\pm\else\textpm\fi{}0.{006}_{\text{stat}}\ifmmode\pm\else\textpm\fi{}0.{013}_{\text{sys}})$ ns, where all the systematic effects have been thoroughly considered.

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We measure the lifetime of the cesium

5^{2}D_{5/2}

1353(5)

ns for the

5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}

state, in agreement with a recent theoretical prediction. In particular, the observed lifetime is consistent with the literature values of the polarizabilities of the cesium

6P

states. Our measurement contributes to resolving a long-standing disagreement between a number of experimental and theoretical results.

We report measurements of the

5d{}^{2}{D}_{5/2},

5d{}^{2}{D}_{3/2},

and

11s{}^{2}{S}_{1/2}

state lifetimes in the

{}^{133}

Cs atom to be 1281(9), 909(15), and 351(4) ns, respectively. A pulsed-dye laser selectively excites atomic Cs from the ground state, via a single-photon quadrupole transition, to the

5d

states and, via a two-photon electric dipole transition, to the

11s

state. A spectrometer-photomultiplier system detects the fluorescence from the decay of interest and a digitizing oscilloscope records the direct output of the photomultiplier. The data are fit to an exponential function to yield a value for the mean lifetime of the selected state.

We present lifetime measurements of the

5{D}_{3∕2}

and

5{D}_{5∕2}

states of rubidium using the time-correlated single-photon-counting method. We perform the experiment in a magneto-optical trap of

^{87}\mathrm{Rb}

atoms using a two-step excitation with the trap laser at

780\phantom{\rule{0.3em}{0ex}}\mathrm{nm}

as the first step. We record the

761.9\phantom{\rule{0.3em}{0ex}}\mathrm{nm}

fluorescence from the decay of the

5{D}_{3∕2}

state to the

5{P}_{1∕2}

state, and measure the lifetime of the

5{D}_{3∕2}

state $\ensuremath{\tau}=246.3(1.6)\phantom{\rule{0.3em}{0ex}}\mathrm{ns}$. We record the

420.2\phantom{\rule{0.3em}{0ex}}\mathrm{nm}

fluorescence from the cascade decay of the

5{D}_{5∕2}

state to the

5{S}_{1∕2}

state through the

6{P}_{3∕2}

state, and extract the lifetime of the

5{D}_{5∕2}

state $\ensuremath{\tau}=238.5(2.3)\phantom{\rule{0.3em}{0ex}}\mathrm{ns}$.

We present a lifetime measurement of the

6s

level of rubidium. We use a time-correlated single-photon counting technique on two different samples of rubidium atoms, a vapor cell with variable rubidium density, and a sample of atoms confined and cooled in a magneto-optical trap. The

5{P}_{1∕2}

level serves as the resonant intermediate step for the two-step excitation to the

6s

level. We detect the decay of the

6s

level through the cascade fluorescence of the

5{P}_{3∕2}

level at 780 nm. The two samples have different systematic effects, but we obtain consistent results that averaged give a lifetime of $45.57\ifmmode\pm\else\textpm\fi{}0.17\phantom{\rule{0.3em}{0ex}}\mathrm{ns}$.

We present a direct lifetime measurement of the

5s5p{\phantom{\rule{0.16em}{0ex}}}^{1}{P}_{1}

state of strontium using time-correlated single-photon counting of laser-induced fluorescence in a hot atomic beam. To achieve fast switch-off times and a high signal-to-noise ratio, we excite the strontium atoms with a femtosecond pulsed laser at approximately 461 nm and collect the fluorescence onto a hybrid single-photon detector. Analysis of the measured exponential decay gives a lifetime of the

{}^{1}{P}_{1}

state of $\ensuremath{\tau}=(5.216\ifmmode\pm\else\textpm\fi{}0.{006}_{\text{stat}}\ifmmode\pm\else\textpm\fi{}0.{013}_{\text{sys}})$ ns, where all the systematic effects have been thoroughly considered.