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.
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