Abstract
The structure of the electronically excited states of 3He and 4He clusters is investigated using fluorescence excitation spectroscopy. Distinct bands are observed energetically close to atomic 1s-ns, nd, np transitions and attributed to perturbed excited He atomiclike states with different principle and orbital quantum numbers. The line shifts and widths of the bands of 3He and 4He clusters of the same size are different and correlate with the average particle density inside the clusters calculated using the density functional method.
Highlights
Liquid 3He and 4He clusters are known to exhibit many fascinating properties such as superfluidity of 4He clusters [1] or a strongly isotope dependent density
With control over the cluster size and the isotopic composition one has two independent parameters to explore the effect of the density on the excited levels
We report the first fluorescence spectra of 3He and 4He clusters in the visible and near infrared range (VIS/IR) which are very sensitive to features at higher energies
Summary
Liquid 3He and 4He clusters are known to exhibit many fascinating properties such as superfluidity of 4He clusters [1] or a strongly isotope dependent density. Distinct bands are observed energetically close to atomic 1s-ns, nd, np transitions and attributed to perturbed excited He atomiclike states with different principle and orbital quantum numbers. The line shifts and widths of the bands of 3He and 4He clusters of the same size are different and correlate with the average particle density inside the clusters calculated using the density functional method.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
