Measurements of g(41+,22+) in 70,72,74 ,76Ge: Systematics of low-lying structures in 30≤Z≤40 and 30≤N≤50 nuclei
Journal article, 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.
Author
G. Gürdal
Rutgers University
E.A. Stefanova
Rutgers University
P. Boutachkov
Rutgers University
D.A. Torres
Rutgers University
G.J. Kumbartzki
Rutgers University
N. Benczer-Koller
Rutgers University
Y.Y. Sharon
Rutgers University
L. Zamick.
Rutgers University
S.J.Q. Robinson
Millsaps College
T. Ahn
Yale University
V. Anagnostatou
Yale University
C. Bernards
University of Cologne
Yale University
M. Elvers
Yale University
University of Cologne
Andreas Martin Heinz
Yale University
G. Ilie
Yale University
D. Radeck
University of Cologne
Yale University
D. Savran
University of Cologne
Yale University
FIAS
V. Werner
Yale University
E.S. Williams
Yale University
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 88 1Subject Categories
Subatomic Physics
Roots
Basic sciences
DOI
10.1103/PhysRevC.88.014301