Photon-trap spectroscopy of size-selected free cluster ions: “direct” measurement of optical absorption of Ag + 9
Cluster Research Laboratory, Toyota Technological Institute, 717-86 Futamata, Ichikawa, Chiba, 272-0001, Japan
2 East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba, 272-0001, Japan
Corresponding author: a email@example.com
Published online: 24 January 2009
An absorption spectrum of size-selected free cluster ions has been measured “directly” via extinction of light without relying on photodepletion/dissociation spectroscopy. The novel technique employs an ion trap and an optical cavity; cluster ions stored in an ion trap interact with photons trapped in a cavity. The storage lifetime of photons in the cavity provides “direct” observation of extinction of light (photon-trap spectroscopy, which is a generalized scheme of cavity ring-down spectroscopy). The first measurement is performed on ultraviolet absorption of Ag9+. Temperature dependence of the spectrum is presented by cooling the ion trap down to 10 K.
PACS: 36.40.Mr – Spectroscopy and geometrical structure of clusters / 42.62.Fi – Laser spectroscopy
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009