Confirmation of triple shape coexistence in 179Hg: Focal plane spectroscopy of the α decay of 183Pb

The α decay of 183Pb has been studied in detail at the focal plane of the RITU gas-filled separator. The four previously known α decay branches have been ordered into the decay of two isomers in 183Pb. The deduced decay scheme and the interpretation of the inferred α decay hindrance factors and γ rays observed at the focal plane are strongly in favor of the recent suggestion of triple shape coexistence-oblate, prolate, and near-spherical in the daughter nucleus 179Hg

First evidence for chirality in Tc isotopes: Spectroscopy of

Excited states in 100Tc have been studied using the 96Zr( 7Li, 3n) reaction at a beam energy of 27 MeV. In the present work, evidence has been found for a second ΔI = 1 band decaying via several stretched dipole transitions to the previously known ΔI = 1 negative-parity band. Comparison of these data with those in neighbouring nuclei and also against recently reported criteria for chiral bands in nuclei, suggests that the two structures can be interpreted as chiral partners. Core quasi-particle coupling model calculations show reasonable agreement with the data and generally support the chiral interpretation of the states

Probing the three shapes in ¹⁸⁶Pb using in-beam γ-ray spectroscopy

This measurement represents the first observation of a non-yrast band in the ¹⁸⁶Pb nucleus by employing the Recoil-Decay Tagging (RDT) technique. Previously known yrast levels have been confirmed and the band is extended up to level Iπ = (16⁺)

Investigation of nuclear collectivity in the neutron mid-shell nucleus 186 Pb

For the first time, non-yrast structures of the neutron mid-shell nucleus Pb186 have been identified in an in-beam I -ray spectroscopy measurement using the recoil-decay tagging technique. The yrast band has been tentatively extended up to IÏ€=20+, re

Evidence for oblate structure in Pb-186

In-beam 3 coincidence data have been collected for Pb186 by combining the JUROGAM Ge-detector array and the GREAT spectrometer with the RITU gas-filled recoil separator for recoil-decay tagging measurements. In addition to the known prolate yrast band i