COLD COLLISION FREQUENCY-SHIFT OF THE 1S-2S TRANSITION IN HYDROGEN

Authors
KILLIAN TC FRIED DG WILLMANN L LANDHUIS D MOSS SC GREYTAK TJ KLEPPNER D
Citation
Tc. Killian et al., COLD COLLISION FREQUENCY-SHIFT OF THE 1S-2S TRANSITION IN HYDROGEN, Physical review letters, 81(18), 1998, pp. 3807-3810
Citations number
23
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
18
Year of publication
1998
Pages
3807 - 3810
Database
ISI
SICI code
0031-9007(1998)81:18<3807:CCFOT1>2.0.ZU;2-H
Abstract
We have observed the cold collision frequency shift of the 1S-2S trans ition in trapped spin-polarized atomic hydrogen. We find Delta v(1s-2s ) = -3.8 +/- 0.8 x 10(-10)n Hz cm(3), where n is the sample density. F rom this we derive the 1S-2S s-wave triplet scattering length, a(1s-2s ) = -1.4 +/- 0.3 nm, which is in fair agreement with a recent calculat ion. The shift provides a valuable probe of the distribution of densit ies in a trapped sample. [S0031-9007(98)07613-3].