Spectroscopy of nonspherical atomic bubbles in solid Helium

Lebedev, Victor; Moroshkin, Peter; Weis, Antoine

doi:10.1021/jp200159s

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Journal article

Spectroscopy of nonspherical atomic bubbles in solid Helium

Lebedev, Victor Département de Physique, Université de Fribourg, Switzerland
Moroshkin, Peter Département de Physique, Université de Fribourg, Switzerland
Weis, Antoine Département de Physique, Université de Fribourg, Switzerland

04.04.2011

Published in:

The Journal of Physical Chemistry A. - 2011, vol. 115, no. 25, p. 7169–7179

English We analyze the effect of the host crystal symmetry on the optical spectra of the 6P_1/2−6S_1/2 and 6P_3/2−6S_1/2 transitions of atomic Cs in solid ⁴He matrices. In particular, we address the deformation of the bubble structures formed by Cs in such quantum crystals. We show that the anisotropy of the stiffness tensor leads to static quadrupolar bubble shape deformations in hexagonally close-packed (hcp) crystals, while the corresponding deformations in the body-centered cubic (bcc) phase of the matrix have a hexadecupolar symmetry. A comparison of the measured excitation spectra with our model calculations allow us to infer quantitative values of the deformation parameters.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language