https://doi.org/10.1140/epja/i2015-15151-7
Regular Article - Theoretical Physics
Nature of
bands in A=140-180 region, a global analysis
1
Ramjas College, University of Delhi, 110007, Delhi, India
2
Physics Department, Vanderbilt University, 37235, Nashville, TN, USA
* e-mail: jbgupta2011@gmail.com
Received:
11
July
2015
Accepted:
17
October
2015
Published online:
25
November
2015
The nature of band is analyzed in the light of the variation of the
and
values, with N and Z, for the
region. The absolute
strengths for the excitation of
and
states are studied. Also the roles of
and
are discussed. Comparison with the dynamic pairing plus quadrupole model, for all the nuclei studied here, are made on a global basis. The lack of overlap in the wave function amplitudes
of
and
of the ground state also explains the reduced
strength. The
is a good measure of the rotational collectivity (deformation) of the band. Shape coexistence at N = 88, 90 nuclei is reviewed. The possibility of
as a
-vibration, when allowed by energy, in expected cases is examined. The interacting boson model predictions are also considered as required.
© SIF, Springer-Verlag Berlin Heidelberg, 2015