Physical Review A

Natural radiative lifetime of Yb in the perturbed 6snd 1 ,3 D2 sequences

Jiang Zhankui, Chengfei Wang, Dadi Wang

Published Oct 1, 1987• 9 citations

Abstract

Natural radiative lifetimes of ytterbium in the 6snd ${}^{1}$${D}_{2}$ (n=10--29), 6snd ${}^{3}$${D}_{2}$ (n=10--20) Rydberg sequences have been measured using stepwise excitation and a fluorescence-decay monitoring method. The lifetimes are perturbed by the 4${f}^{13}$5d6s6p configuration near n=11 and 27, except when the ${n}^{\mathrm{*}3}$ dependence of the lifetime values appeared. The lifetimes of the perturbing 5d6s6p states were also measured.

DOI: 10.1103/physreva.36.3184

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Physical Review A

Natural radiative lifetime of Yb in the perturbed 6snd 1 ,3 D2 sequences

Jiang Zhankui, Chengfei Wang, Dadi Wang

Published Oct 1, 1987• 9 citations

Publisher

Abstract

Natural radiative lifetimes of ytterbium in the 6snd

{}^{1}$${D}_{2}

(n=10--29), 6snd

{}^{3}$${D}_{2}

(n=10--20) Rydberg sequences have been measured using stepwise excitation and a fluorescence-decay monitoring method. The lifetimes are perturbed by the 4

{f}^{13}

5d6s6p configuration near n=11 and 27, except when the

{n}^{\mathrm{*}3}

dependence of the lifetime values appeared. The lifetimes of the perturbing 5d6s6p states were also measured.

DOI: 10.1103/physreva.36.3184

Related papers

Lifetimes of Rydberg levels in the perturbed 6snp 3 P2 series of ytterbium i

Guo Chuan, Yingning Yu, Hua Yu +2 more

Using three-step laser excitation in an atomic beam and a time-resolved spectroscopy technique, we measured both the lifetimes of the Rydberg levels of Yb i belonging to the perturbed series 6nsp $^{3}$ ${\mathit{P}}_{2}$ and the lifetimes of the perturbing 4${\mathit{f}}^{13} $5$ {\mathit{d}}^{2}$6s $^{3}$ ${\mathit{P}}_{2}$ ${,}^{1}$ ${\mathit{D}}_{2}$ levels. An expected shortening has been observed for the lifetimes of those levels which are strongly mixed with the perturbers.Using three-step laser excitation in an atomic beam and a time-resolved spectroscopy technique, we measured both the lifetimes of the Rydberg levels of Yb i belonging to the perturbed series 6nsp $^{3}$${\mathit{P}}_{2}$ and the lifetimes of the perturbing 4${\mathit{f}}^{13}$5${\mathit{d}}^{2}$6s $^{3}$${\mathit{P}}_{2}$${,}^{1}$${\mathit{D}}_{2}$ levels. An expected shortening has been observed for the lifetimes of those levels which are strongly mixed with the perturbers.

Physical Review AFeb 1, 19933 citations

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Multichannel quantum-defect theory of lifetimes for highly excited states of atoms: Calculation of Yb lifetimes in the perturbed 6snd 1 ,3 D2 sequences

X. W. Liu, Z -W Wang

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Measurement of Rydberg positronium fluorescence lifetimes

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We report measurements of the fluorescence lifetimes of positronium (Ps) atoms with principal quantum numbers $n=10--19$ . Ps atoms in Rydberg-Stark states were produced via a two-color two-step $1\phantom{\rule{0.16em}{0ex}}^{3}S\ensuremath{\rightarrow}2\phantom{\rule{0.16em}{0ex}}^{3}P\ensuremath{\rightarrow}n\phantom{\rule{0.16em}{0ex}}^{3}S/n\phantom{\rule{0.16em}{0ex}}^{3}D$ excitation scheme and subsequently detected after traveling 1.2 m. The measured time-of-flight distributions were used to determine the mean lifetimes of the Rydberg levels, yielding values ranging from $3\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{s}$ to $26\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{s}$. Our data are in accord with the expected radiative lifetimes of Rydberg-Stark states of Ps.We report measurements of the fluorescence lifetimes of positronium (Ps) atoms with principal quantum numbers $n=10--19$. Ps atoms in Rydberg-Stark states were produced via a two-color two-step $1\phantom{\rule{0.16em}{0ex}}^{3}S\ensuremath{\rightarrow}2\phantom{\rule{0.16em}{0ex}}^{3}P\ensuremath{\rightarrow}n\phantom{\rule{0.16em}{0ex}}^{3}S/n\phantom{\rule{0.16em}{0ex}}^{3}D$ excitation scheme and subsequently detected after traveling 1.2 m. The measured time-of-flight distributions were used to determine the mean lifetimes of the Rydberg levels, yielding values ranging from $3\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{s}$ to $26\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{s}$. Our data are in accord with the expected radiative lifetimes of Rydberg-Stark states of Ps.

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Experimental investigation of excited-state lifetimes in atomic ytterbium

C. J. Bowers, Dmitry Budker, Eugene D. Commins +5 more

Lifetimes of 21 excited states in atomic Yb were measured using time-resolved fluorescence detection following pulsed laser excitation. The lifetime of the 4${\mathit{f}}^{14} $5d6$ {\mathit{s}}^{\mathrm{}3}$ ${\mathit{D}}_{1}$ state, which is of particular importance for a proposed study of parity nonconservation in atoms, was measured to be 380(30) ns. \textcopyright{} 1996 The American Physical Society.Lifetimes of 21 excited states in atomic Yb were measured using time-resolved fluorescence detection following pulsed laser excitation. The lifetime of the 4${\mathit{f}}^{14}$5d6${\mathit{s}}^{\mathrm{}3}$${\mathit{D}}_{1}$ state, which is of particular importance for a proposed study of parity nonconservation in atoms, was measured to be 380(30) ns. \textcopyright{} 1996 The American Physical Society.

Physical Review AMay 1, 199654 citations

Natural radiative lifetimes of ytterbium in the 6snd

{}^{1}$${D}_{2}

(n=10--29), 6snd

{}^{3}$${D}_{2}

(n=10--20) Rydberg sequences have been measured using stepwise excitation and a fluorescence-decay monitoring method. The lifetimes are perturbed by the 4

{f}^{13}

5d6s6p configuration near n=11 and 27, except when the

{n}^{\mathrm{*}3}

dependence of the lifetime values appeared. The lifetimes of the perturbing 5d6s6p states were also measured.

Using three-step laser excitation in an atomic beam and a time-resolved spectroscopy technique, we measured both the lifetimes of the Rydberg levels of Yb i belonging to the perturbed series 6nsp

^{3}

{\mathit{P}}_{2}

and the lifetimes of the perturbing 4${\mathit{f}}^{13}

5

{\mathit{d}}^{2}$6s

^{3}

{\mathit{P}}_{2}

{,}^{1}

{\mathit{D}}_{2}

levels. An expected shortening has been observed for the lifetimes of those levels which are strongly mixed with the perturbers.

^{1}D_{2}

(n=8--40) and 6snd

^{3}D_{2}

(n=10--26) Rydberg levels, and the perturbers of the ytterbium atom. We have not only obtained results that are in perfect agreement with the recent measurements, but also predicted the lifetimes of 18 other highly excited states. The results indicate that the dramatic variation for lifetimes of Rydberg states in the vicinity of perturbing states is due to the strong channel interaction.

High Rydberg levels of ytterbium were studied in a beam of metastable atoms. Levels of the series 4f

^{14}

sn

d were populated from the metastable 4f

^{14}

6s 6p

^3

_o

level by means of the U.V. light of a frequency-doubled single-mode dye laser and detected using the field ionization technique. The critical ionization fields

F_c

of the levels 4f

^{14}

sn

^3

_1

(24 ≤ n ≤ 57) were measured and found to obey the saddle point law (

F_c

= (16

n^{*4}

)

^{-1}

). The hyperfine structures of the odd isotopes were investigated. They are very peculiar due to the fact that the hyperfine interaction is of the same order of magnitude as (or even for the highest

n

values, much more important than) the spin-orbit and electrostatic interactions. A theoretical account of the observed structures using the Slater-Condon parametric method is given. The relative influence of the excited (

n

d) and of the non-excited (6s) optical electron could thus be studied. Furthermore the influence of a valence level perturbing only the odd isotopes components for

n

= 26 was demonstrated.

We report measurements of the fluorescence lifetimes of positronium (Ps) atoms with principal quantum numbers

n=10--19

. Ps atoms in Rydberg-Stark states were produced via a two-color two-step $1\phantom{\rule{0.16em}{0ex}}^{3}S\ensuremath{\rightarrow}2\phantom{\rule{0.16em}{0ex}}^{3}P\ensuremath{\rightarrow}n\phantom{\rule{0.16em}{0ex}}^{3}S/n\phantom{\rule{0.16em}{0ex}}^{3}D$ excitation scheme and subsequently detected after traveling 1.2 m. The measured time-of-flight distributions were used to determine the mean lifetimes of the Rydberg levels, yielding values ranging from $3\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{s}$ to $26\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{s}$. Our data are in accord with the expected radiative lifetimes of Rydberg-Stark states of Ps.

Lifetimes of 21 excited states in atomic Yb were measured using time-resolved fluorescence detection following pulsed laser excitation. The lifetime of the 4${\mathit{f}}^{14}

5d6

{\mathit{s}}^{\mathrm{}3}$

{\mathit{D}}_{1}

state, which is of particular importance for a proposed study of parity nonconservation in atoms, was measured to be 380(30) ns. \textcopyright{} 1996 The American Physical Society.