DIRECT DETERMINATION OF THE MASS OF SI-28 AS A CONTRIBUTION TO A NEW DEFINITION OF THE KILOGRAM

Authors
JERTZ R BECK D BOLLEN G EMMES J KLUGE HJ SCHARK E SCHWARZ S SCHWARZ T SCHWEIKHARD L SENNE P CARLBERG C BERGSTROM I BORGENSTRAND H ROULEAU G SCHUCH R SODERBERG F
Citation
R. Jertz et al., DIRECT DETERMINATION OF THE MASS OF SI-28 AS A CONTRIBUTION TO A NEW DEFINITION OF THE KILOGRAM, Physica scripta. T, 48(4), 1993, pp. 399-404
Citations number
24
Categorie Soggetti
Physics
Journal title
Physica scripta. T → ACNP
ISSN journal
02811847
Volume
48
Issue
4
Year of publication
1993
Pages
399 - 404
Database
ISI
SICI code
0281-1847(1993)48:4<399:DDOTMO>2.0.ZU;2-M
Abstract
The mass of Si-28 has been determined to be m(Si-28) = 27.976 926 57(3 0)u by comparing the cyclotron frequencies of the singly charged ions C-12+, C-12(3)+ and Si-28+ in a Penning trap mass spectrometer. The ex perimental technique and the setup are described. The obtained accurac y as well as possible improvements are discussed. Our measurements are related to current efforts to base the kilogram on atomic properties by using an almost perfect single crystal of silicon.