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Measurement of the dipole moment of the 6/sup 3/P/sub 1/--(7/2, 3/2)/sub 2/ transition and lifetime of the ytterbium atom in the (7/2, 3/2)/sub 2/ state

S. K. Borisov, Н.А. Карпов, F. E. Karulin, B. B. Krynetskiǐ, В. А. Мишин, O. M. Stelmakh, S. Yu. Pentegov

Published Jun 1, 1987• 0 citations
OpenAlex

Abstract

The dipole moment of the transition between the 6/sup 3/P/sub 1/ and (7/2, 3/2)/sub 2/ levels was determined by the multistage-excitation method to be d = 1.15 x 10/sup -30/ C m, and the lifetime (T/sub 1/ = 1.2 +- 0.5 ..mu..sec) of the ytterbium atom was measured.

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arXiv:1106.3447•Physical Review Letters•Aug 22, 2011•20 citations
LIFETIME OF THE 6sup3sup 3sup3Psub1sub 1sub1 EXCITED STATE OF MERCURY VAPOR FOR THE ISOTOPES WITH EVEN AND ODD MASSES
By combining the quantum theory of radiative transition with multichannel quantum-defect theory, we have derived a general formula to calculate the lifetimes of highly excited states for atoms. As an example, we have evaluated the lifetimes for the perturbed 6snd 1D2^{1}D_{2}1D2​ (n=8--40) and 6snd 3D2^{3}D_{2}3D2​ (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.
The generation of a fountain of laser-cooled ytterbium fluoride, YbF, has been recently proposed\footnote{Tarbutt, M R; Sauer, B E; Hudson, J J; Hinds E A, New J. Phys 15, 053034, 2013.} as a method for long coherent observation times, thereby improving the electron electric dipole moment (eEDM) measurement. Understanding the properties of the excited electronic states of YbF is essential for the development of such a scheme for laser cooling. Here we report on the measurement of the radiative lifetimes,τ\tauτ, permanent electric dipole moments, μ\muμel_{el}el​, and magnetic g-factors for the [18.6] and [18.7] excited states of YbF. The results are compared with the previously determined values for [18.1] state\footnote{Zhuang,X; Le,A.;Steimle, T C; Bulleid, N E; Smallman, I J; Hendricks, R J; Skoff, S M ; M R; Hudson, J J; Sauer, B E; Hinds, Tarbutt, M R, PCCP, 13 19103, 2011}\footnote{Condylis,P C; Hudson, J J; Tarbutt, M R; Sauer, B E; Hinds E A, J. Chem. Phys. 123, 231101, 2005}. The [18.1] state is the Ω\OmegaΩ=1/2 spin-orbit component of the A 2^{2}2Π\PiΠ(v=0) electronic state arising from the Yb+^{+}+(4f$^{14}6p6p6p\pi)F)F)F^{-}(2p(2p(2p^{14}$) configuration. The experimentally determined μ\muμel_{el}el​, and g-factors will be used to unravel the nature of the [18.6] and [18.7] states, which are known to be admixtures A 2^{2}2Π\PiΠ and an additional Ω\OmegaΩ=1/2 state of unknown electronic configuration.
Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p ³P(0) level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous.