Nuclei at High Angular Momentum

Isomers and oblate collectivity at high spin in neutron-rich Pt isotopes

“…The moment of inertia of a rigid prolate rotor is higher in comparison to that of an oblate one for similar magnitudes of quadrupole deformation [1]. Consequently, the excitation energies for prolate rotational states, particularly at high spin, are expected to be lower than the corresponding oblate ones.…”

Conservation laws and inertial parameters in the quasiparticle random phase approximation at finite temperature and high spin

“…New experimental techniques have pushed to higher and higher spin (-40h) the resolution of discrete lines in the yrast limit and at low excitation energy above it. For high spin and high excitation energy correlation methods have been developed (2) to disentangle the seemingly structureless spectra. In this regard, very recently, Deleplanque et al,(3) using the feeding correction method, successfully measured very detailed features, such as the dynamic moment of inertia, in the quasicontinuum of some transitional Rare-Earth nuclei.…”

Lifetimes of unresolved transitions from very high spin states in nuclei nearN=82

“…In recent years considerable information has been obtained by a variety of spectroscopic techniques. The unresolved spectra which are connected to the de-excitation of the high spin states populated in heavy-ion compound-nucleus reactions are typically composed of three parts [1][2][3][4][5]: a statistical component, an E2-bump and a lower-energy dipole part. Much of the interest has been focussed on the E2-bump because it is the most pronounced feature of these spectra.…”