HIGH SPIN STATES IN 191OS

Document Type: Regular Paper

Authors

1 Physics Department, Payam Noor University, Mashhad 91735, I. R. of Iran

2 Department of Physics, University of Surrey, Guildford, GU2 7XH, UK

Abstract

High spin states in the neutron rich nucleus 191Os has been populated for the first time using the
82Se+192Os deep-inelastic reaction at 460 MeV beam energy using the ALPI accelerators at the Laboratory
Nazionali di Legnaro, Italy. High fold γ-γ coincidences were acquired with the 4π spectrometer GASP
detector array, consisting of 40 Compton-suppressed, large-volume germanium detectors with an inner ball
consisting of 80 BGO crystals acting as a multiplicity filter and a total-energy spectrometer. The new
discovered level scheme is extended up to spin 19/2+. The observed structure is interpreted as fragments of a
rotational band built on single neutron configuration {11/2+ [615]} according to a Nilsson deformed shell
model.

Keywords