Measurements of g(41+,22+) in 70,72,74 ,76Ge: Systematics of low-lying structures in 30≤Z≤40 and 30≤N≤50 nuclei
Artikel i vetenskaplig tidskrift, 2013

Background: The interplay between single-particle and collective excitations in the 30 ≤Z≤ 40 and 30 ≤N≤ 50 even-even isotopes has been examined in light of recent new measurements of magnetic moments of 41+, 22+, and 21+ states. Purpose: The g factors of the 41+ and 22+ states in the 72,74,76Ge isotopes have been measured for the first time and the g(21+) values have been remeasured. Methods: The transient field (TF) technique in inverse kinematics with a variety of targets has been applied, following Coulomb excitation of the relevant states. The data have been analyzed within the framework of the IBA-II model. Large-scale shell-model calculations have been performed within the p3/2,p1/2,f 5/2,g9/2 orbital space for both protons and neutrons with the JUN45 and JJ4B interactions. Results: The measured Ge g factors were compared to the g factors of the low-lying states of the neighboring Zn, Ge, Se, Kr, and Sr isotopes. The results were evaluated in the context of the systematics of g factors in the A∼80 region. Conclusions: The predictions based on the classic collective model and the interacting boson model IBA-II agree with the experimental results. No evidence for shell closure was found for neutrons at N=38 or N=40. © 2013 American Physical Society.

Författare

G. Gürdal

E.A. Stefanova

P. Boutachkov

D.A. Torres

G.J. Kumbartzki

N. Benczer-Koller

Y.Y. Sharon

L. Zamick.

S.J.Q. Robinson

T. Ahn

V. Anagnostatou

C. Bernards

M. Elvers

Andreas Martin Heinz

Chalmers, Teknisk fysik, Subatomär fysik

G. Ilie

D. Radeck

D. Savran

V. Werner

E.S. Williams

Physical Review C - Nuclear Physics

0556-2813 (ISSN) 1089-490X (eISSN)

Vol. 88 1

Ämneskategorier

Subatomär fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevC.88.014301