Determination of the Cs-133 and proton mass ratio using highly charged ions

Authors
Carlberg, C Fritioff, T Bergstrom, I
Citation
C. Carlberg et al., Determination of the Cs-133 and proton mass ratio using highly charged ions, PHYS REV L, 83(22), 1999, pp. 4506-4509
Citations number
27
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
22
Year of publication
1999
Pages
4506 - 4509
Database
ISI
SICI code
0031-9007(19991129)83:22<4506:DOTCAP>2.0.ZU;2-3
Abstract
The ratio of the Cs-133 and proton mass has been determined by comparing th e cyclotron frequencies of highly charged (about 40+) Cs,Cs-12(4+), and H-2 (+) ions in a Penning trap. This ratio is determined to 131.91535591(24)(15 ), which is a tenfold improvement in accuracy over the previously determine d value. This result may be used to improve the knowledge of the line struc ture constant alpha, in a way which does not require detailed QED calculati ons.