First measurements of g factors in the even Kr isotopes - art. no. 024314

Citation
Tj. Mertzimekis et al., First measurements of g factors in the even Kr isotopes - art. no. 024314, PHYS REV C, 6402(2), 2001, pp. 4314
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C
ISSN journal
0556-2813 → ACNP
Volume
6402
Issue
2
Year of publication
2001
Database
ISI
SICI code
0556-2813(200108)6402:2<4314:FMOGFI>2.0.ZU;2-8
Abstract
The g factors of the 2(1)(+) and 4(1)(+) states in Kr-78,Kr-80,Kr-82,Kr-84, Kr-86 have been measured for the first time, using Coulomb excitation of is otopic Kr beams and the transient field technique. The measured g factors o f 2(1)(+) states in Kr-78,Kr-80,Kr-82 are well described, in both magnitude and progression with neutron number, by the IBA-II model. Whereas the ligh ter isotopes show a dominant collective structure with g factor values clos e to Z/A, the large g(2(1)(+)) = 1.12(14) value of Kr-86, with its closed N = 50 shell, is unequivocally dominated by specific proton configurations. The g factor of the 2(1)(+) state in Kr-84, with two holes in the 1g(9/2) n eutron orbit, reflects both proton and neutron components in the wave funct ion. In addition, the lifetimes of several 2(1)(+) and 4(1)(+) states were remeasured by the Doppler shift attenuation method, yielding values which, in some cases, differ from those in the literature.