Slow spin relaxation of Rb atoms confined in glass cells filled with denseHe-4 gas at 1.85 K

Citation
A. Hatakeyama et al., Slow spin relaxation of Rb atoms confined in glass cells filled with denseHe-4 gas at 1.85 K, PHYS REV L, 84(7), 2000, pp. 1407-1410
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
84
Issue
7
Year of publication
2000
Pages
1407 - 1410
Database
ISI
SICI code
0031-9007(20000214)84:7<1407:SSRORA>2.0.ZU;2-I
Abstract
At temperatures below 2.1 K, long-lived gaseous Rb atoms in glass cells hav e been generated with a simple method: irradiating the cells, containing He -4 gas and Rb metal, with a cw laser The obtained atomic Rb density (simila r to 10(8) cm(-3)) decreases with a 1/e time constant of about 10 s at 1.85 K. We have performed optical pumping of the Rb atoms and measured the long itudinal electronic spin relaxation time at 1.85 K as well. For processes ( such as Rb-He collisions) which do not remove the atomic Rb from the vapor, this relaxation time is found to be about 60 +/- 15 s.