HIGH SPIN STATES IN 191OS

Abstract

High spin states in the neutron rich nucleus 191Os has been populated for the first time using the82Se+192Os deep-inelastic reaction at 460 MeV beam energy using the ALPI accelerators at the LaboratoryNazionali di Legnaro, Italy. High fold γ-γ coincidences were acquired with the 4π spectrometer GASPdetector array, consisting of 40 Compton-suppressed, large-volume germanium detectors with an inner ballconsisting of 80 BGO crystals acting as a multiplicity filter and a total-energy spectrometer. The newdiscovered level scheme is extended up to spin 19/2+. The observed structure is interpreted as fragments of arotational band built on single neutron configuration {11/2+ [615]} according to a Nilsson deformed shellmodel.