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Spectroscopy of nonspherical atomic bubbles in solid helium.

V Lebedev¹, P Moroshkin, A Weis

¹Département de Physique, Université de Fribourg, Chemin du Musée 3, 1700 Fribourg, Switzerland. victor.lebedev@unifr.ch

The Journal of Physical Chemistry. A

|April 6, 2011

Summary

This summary is machine-generated.

The crystal symmetry of solid helium influences cesium atom optical spectra by deforming bubble structures. Hexagonal close-packed (hcp) crystals cause quadrupolar deformations, while body-centered cubic (bcc) crystals induce hexadecupolar symmetry.

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Area of Science:

Atomic physics
Solid-state physics
Quantum crystals

Background:

Cesium (Cs) atoms in solid helium matrices exhibit unique optical properties.
The quantum nature of solid helium can influence atomic behavior and structure formation.
Understanding these interactions is crucial for solid-state and atomic physics research.

Purpose of the Study:

To investigate the impact of host crystal symmetry on the optical spectra of atomic cesium.
To analyze the deformation of bubble structures surrounding Cs atoms in solid helium.
To correlate crystal structure with atomic spectral characteristics.

Main Methods:

Analysis of optical spectra for cesium transitions (6P(1/2)-6S(1/2) and 6P(3/2)-6S(1/2)).
Theoretical modeling of bubble structure deformation in different helium crystal phases (hcp and bcc).
Comparison of experimental excitation spectra with model calculations.

Main Results:

Host crystal symmetry dictates the symmetry of bubble shape deformations around Cs atoms.
Anisotropy in the stiffness tensor of hcp solid helium leads to static quadrupolar deformations.
Deformations in bcc solid helium exhibit hexadecupolar symmetry.

Conclusions:

Crystal symmetry significantly affects atomic behavior and nanostructure formation in quantum crystals.
The study provides quantitative deformation parameters for Cs in solid helium.
This work advances the understanding of atom-matrix interactions in exotic quantum environments.