Standard Article

Helium Droplets as Nanocryostats for Molecular Spectroscopy—from the Vacuum Ultraviolet to the Microwave Regime

  1. Carlo Callegari1,2,
  2. Wolfgang E. Ernst1

Published Online: 15 SEP 2011

DOI: 10.1002/9780470749593.hrs064

Handbook of High-resolution Spectroscopy

Handbook of High-resolution Spectroscopy

How to Cite

Callegari, C. and Ernst, W. E. 2011. Helium Droplets as Nanocryostats for Molecular Spectroscopy—from the Vacuum Ultraviolet to the Microwave Regime. Handbook of High-resolution Spectroscopy. .

Author Information

  1. 1

    Graz University of Technology, Institute of Experimental Physics, Graz, Austria

  2. 2

    Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, Italy

Publication History

  1. Published Online: 15 SEP 2011

Abstract

The spectroscopy of pure and doped helium nanodroplets is reviewed, with the goal to provide a reference for nonspecialists. The technical aspects of a helium-droplet machine for spectroscopy are addressed first. Spectroscopic methods and results are then presented, loosely divided according to the degree of freedom being excited (that is, practically, by photon energy). Technical aspects pertaining to each branch are presented, along with an overview of the physics that can be studied and of possible physical-chemistry applications. References for further reading are provided.

Keywords:

  • helium;
  • superfluid;
  • nanodroplets;
  • spin;
  • rotational;
  • rovibrational;
  • electronic;
  • matrix;
  • relaxation;
  • confinement