Laser-induced fluorescence spectra of Ba{sup +}*-He exciplexes produced in cold He gas
- RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
- Department of Physics, Toyama University, 3190 Gofuku, Toyama 930-8555 (Japan)
We report the observation of laser-induced fluorescence spectra of Ba{sup +*}-He exciplexes. The experiment is carried out in an environment of cold gaseous helium at a temperature range of 3-30 K. We have observed the emission spectra of exciplexes by means of excitation of the 6p {sup 2}P{sub 32}<-6s {sup 2}S{sub 12} transition of Ba{sup +} ions. It is found that these spectra are redshifted from the D2 emission line in the free space and are composed of several peaks. The experimental results are reproduced well by theoretical calculation of the emission spectra for vibrational levels of Ba{sup +*}-He. We also investigate the vibrational dynamics of the 6p {sup 2}{pi}{sub 32} state of Ba{sup +}*-He, and we have determined the collision-induced vibrational relaxation cross sections of the 6p {sup 2}{pi}{sub 32} state to be 9.7{+-}1.1 A{sup 2} at 15 K.
- OSTI ID:
- 20640975
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Emission spectra of Rb{sup *}He{sub n} exciplexes in a cold {sup 4}He gas
Emission spectra of alkali-metal (K,Na,Li)-He exciplexes in cold helium gas