Speaker
Description
Neutron-rich nuclei in the A∼100 region show rapid change in shape as a function of both proton and neutron numbers. The shape of some of the even-Z nuclei in this region also exhibits ellipsoidal oscillations, known as gamma vibrations. These gamma-vibrational bands are a measure of triaxiality and gamma softness in this region. Furthermore, the two-phonon gamma-vibrations also provide tests of Pauli principle. As part of a study of the evolution of the structure of even-odd and odd-odd neutron-rich Nb isotopes, the structure of 104Nb was investigated from two complementary methods: i) high statistics triple- and four-fold gamma coincidences from the spontaneous fission of 252Cf using Gammasphere and ii) prompt gamma from the induced fission of the 238U+9Be reaction with isotopic fragment identification using the VAMOS++ and the AGATA spectrometers. Observation of multi-phonon gamma vibrations and shape coexistence of this odd-odd nucleus will be presented.
