Eur. Phys. J. A 14, 159-167 (2002)
DOI: 10.1140/epja/i2001-10201-5
High-spin states in
and their underlying
shell model configurations
H. Röpke, J. Brenneisen and M. Lickert Fakultät für Physik der Universität Freiburg, Freiburg i.Br., Germany muehelga@uni-freiburg.de
(Received 21 December 2001 Communicated by D. Schwalm)
Abstract
Eight high-spin states in
below
10 MeV excitation energy, among them a prospective
state at 9408 keV and the
levels of the
recently discovered superdeformed rotational band, have been
observed by n-
coincidence measurements with the
reaction at
and
13.4 MeV. High-spin assignments of, respectively,
and
5- were obtained for the
and 1462 keV
(
Ex=9682 and 9927 keV) resonances of the
reaction by a measurement of
-ray angular distributions. The spectrum of the high-spin
and of the
MeV levels is decomposed according to
the underlying shell model configurations with
n=0,1,2,4 particles
excited from the
N = 2 into the
N = 3 major shell. The role of
four-particle excitations, all connected with large prolate
distortions, is elucidated for the entire
A=36-40 mass region.
27.30.+t -
.
21.60.Cs - Shell model.
21.10.Re - Collective levels.
© Società Italiana di Fisica, Springer-Verlag 2002
