ACCURATE MEASUREMENT OF THE 2(3)S(1)-3(3)D(1) 2-PHOTON TRANSITION FREQUENCY IN HELIUM - NEW DETERMINATION OF THE 2(3)S(1) LAMB SHIFT

Authors
DORRER C NEZ F DEBEAUVOIR B JULIEN L BIRABEN F
Citation
C. Dorrer et al., ACCURATE MEASUREMENT OF THE 2(3)S(1)-3(3)D(1) 2-PHOTON TRANSITION FREQUENCY IN HELIUM - NEW DETERMINATION OF THE 2(3)S(1) LAMB SHIFT, Physical review letters, 78(19), 1997, pp. 3658-3661
Citations number
26
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
78
Issue
19
Year of publication
1997
Pages
3658 - 3661
Database
ISI
SICI code
0031-9007(1997)78:19<3658:AMOT22>2.0.ZU;2-8
Abstract
We have performed a precise measurement of the 2(3)S(1)-3(3)D(1) two-p hoton transition frequency in He-4 at 762 nm. The 2(3)S(1)-3(3)D(1) fr equency is 786823850.002(56) MHz, with a relative uncertainty of 7.1 x 10(-11). The deduced 2(3)S(1) Lamb shift is 4057.276(60) MHz. This re sult, the most accurate at the present time, reduces the uncertainty i n the 2(3)S(1) Lamb shift by 1 order of magnitude and is 100 times mor e precise than the theoretical prediction [4062.3(8.0) MHz].