β-decay study of 54,55Ni produced by an element-selective laser ion source

被引：45

作者：

Reusen, I

Andreyev, A

Andrzejewski, J

Bijnens, N

Franchoo, S

Huyse, M

Kudryavtsev, Y

Kruglov, K

Mueller, WF

Piechaczek, A

Raabe, R

Rykaczewski, K

Szerypo, J

Van Duppen, P

Vermeeren, L

Wauters, J

Wöhr, A

机构：

[1] Univ Louvain, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium

[2] Joint Inst Nucl Res, FLNP, Dubna 141980, Russia

[3] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

来源：

PHYSICAL REVIEW C | 1999年 / 59卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.59.2416

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

beta-decay studies of the neutron-deficient Ni-54,Ni-55 isotopes have been performed at the Leuven isotope separator on-line facility (LISOL) at Louvain-la-Neuve. The nuclei of interest are produced using an element-selective laser ion source coupled to the on-line mass separator. The half-life of Ni-55 (T-1/2= 204+/-3 ms) was remeasured precisely and the beta(+) decay of Ni-54 was observed for the first time. The beta(+)-decay Gamow-Teller strength [B(GT)] associated with the (J(pi)=1(+)) level at 937.2 keV in the daughter nucleus Co-54 was deduced. The beta(+) GT strength of 1.09+/-0.25 obtained from the measured half life of Ni-54 (T-1/2 = 106+/-12 ms) and branching ratio (I-beta=22.4 +/- 4.4%) towards this level is in agreement with the GT strength obtained from (p,n) reaction studies on Fe-54 [B(GT-) = 1.172+/-0.078]. [S0556-2813(99)03405-6].

引用

页码：2416 / 2421

页数：6

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