▪ Abstract Laser ablation of in situ metals has recently made it possible to immerse a large
number of different metal atoms and ions and small clusters of metal atoms in liquid helium …

This review is devoted to optical studies of foreign particles in superfluid 4 He. Starting with
single excess electrons, helium ions and metastable helium atoms, various methods for the …

The dynamics of excess electron localization in a bubble (equilibrium radius 17 Å) in liquid
He is described in terms of the initial formation of an incipient bubble of radius 3.5 Å …

The studies of defects formed by impurity particles (atoms, molecules, exciplexes, clusters,
free electrons, and positive ions) embedded in liquid and solid 4He are reviewed. The …

accepted July 15, 2008; published November 10, 2008) An electron injected into liquid
helium forces open a small cavity that is free of helium atoms. This object is referred to as an …

We have measured the pressure broadening and shift of the excitation and emission lines of
the 6 s 2 1 S 0→ 6s6p 1 P 1 transition of Ba atoms implanted in liquid and solid helium at 1.5 …

The excitation and emission spectra of alkali-metal atoms (Cs and Rb) in liquid helium are
studied. The helium pressure is changed from the saturated vapor pressure to about 25 atm …

Our recent experiments show that the D 2 excitation spectra of Cs and Rb atoms in
superfluid helium have doubly shaped profiles. Such line shapes are beyond the description …

An electron in liquid helium forces open a cavity referred as an electron bubble. These
objects have been studied in many past experiments. It has been discovered that under …

Detection of Excited-State Electron Bubbles in Superfluid Helium Page 1 Detection of
Excited-State Electron Bubbles in Superfluid Helium Denis Konstantinov and Humphrey J …