The level scheme of Re-177 has been extended extensively, with fragmen
ts of more than thirty bands, characterised by a given signature, obse
rved. Alignments at low frequency in one-quasiparticle bands are inter
preted as deformation effects and compared with the predictions of cra
nking calculations. The previously assigned one-quasiparticle pi i(13/
2) band is shown to be a mixture of three-quasiparticle and vibrationa
l character. The non-observation of the one-quasiparticle pi i(13/2) b
and is explained as being due to crossings of its s-band by competing
bands. A number of high-K bands are also reported, including five- and
seven-quasiparticle bands. Configuration assignments for these bands
are aided by comparing experimental g(K) values with ''effective'' g(K
) values, calculated with a semi-classical expression taking Coriolis
mixing into account. The population of the yrast band was observed to
oscillate with every four units of spin.