Precise half-life measurement for the superallowed 0+ → 0+ β emitter 74Rb:: First results from the new radioactive beam facility (ISAC) at TRIUMF

被引：45

作者：

Ball, GC

Bishop, S

Behr, JA

Boisvert, GC

Bricault, P

Cerny, J

D'Auria, JM

Dombsky, M

Hardy, JC

Iacob, V

Leslie, JR

Lindner, T

Macdonald, JA

Mak, HB

Moltz, NM

Powell, J

Savard, G

Towner, IS

机构：

[1] TRIUMF, Vancouver, BC V6T 2A3, Canada

[2] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[3] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA

[4] Texas A&M Univ, Dept Phys & Cyclotron Inst, College Stn, TX 77843 USA

[5] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[6] Argonne Natl Lab, Dept Phys, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.86.1454

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Presently, the world data fur superallowed beta decay leads to a result in disagreement (at the 98% confidence level) with the predictions of the minimal standard model fur the unitarity of the Cabibbo-Kubayashi-Maskawa matrix. Precise data for the superallowed 0(+) --> 0(+) beta decay of Rb-74 would provide a critical test of the: nucleus-dependent isospin symmetry-breaking corrections that must be calculated for these: superallowed Fermi beta decays. The present work reports the first precise measurement of the half-life for Rb-74 (t(1/2) = 64.761 +/- 0.031 ms). The data were obtained at the radioactive beam facility (ISAC) at TRIUMF using a beam of similar to 4000 Rb-74 ions s(-1).

引用

页码：1454 / 1457

页数：4