Elsevier

Physics Letters A

Volume 146, Issue 3, 14 May 1990, Pages 134-140
Physics Letters A

Laser spectroscopy of alkaline earth atoms in He II

https://doi.org/10.1016/0375-9601(90)90651-4Get rights and content

Abstract

The absorption and emission bands from calcium, strontium and barium atoms produced in superfluid helium have been observed. A model calculation on the basis of the bubble model is reported, which can describe the main observed features such as line shifts and broadenings. From a comparison with the experiment we conclude that the investigated atoms form a bubble state in the liquid similar to the system of barium ions and excess electrons.

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