One- and two-photon spectroscopy of highly excited states of alkali-metal atoms on helium nanodroplets |
| |
Authors: | Pifrader Alexandra Allard Olivier Auböck Gerald Callegari Carlo Ernst Wolfgang E Huber Robert Ancilotto Francesco |
| |
Institution: | Institute of Experimental Physics, TU Graz, Petersgasse 16, A-8010 Graz, Austria. |
| |
Abstract: | Alkali-metal atoms captured on the surface of superfluid helium droplets are excited to high energies (≈3?eV) by means of pulsed lasers, and their laser-induced-fluorescence spectra are recorded. We report on the one-photon excitation of the (n+1)p←ns transition of K, Rb, and Cs (n=4, 5, and 6, respectively) and on the two-photon one-color excitation of the 5d←5s transition of Rb. Gated-photon-counting measurements are consistent with the relaxation rates of the bare atoms, hence consistent with the reasonable expectation that atoms quickly desorb from the droplet and droplet-induced relaxation need not be invoked. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|