Rotation aligned negative parity side bands in light tungsten and osmium nuclei

Rotation aligned negative parity sidebands have been observed in the light Tungsten and Osmium isotopes. The development from octupole bands to aligned 2-quasiparticle bands is discussed. The hsub(9/2) proton and isub(13/2) neutron are the likely configurations causing the alignment. Backbending observed in the odd spin negative parity sidebands in 180Os suggests that both proton and neutron configurations are involved at high spin. New results on backbending in the yrast bands of the light Osmium isotopes are also discussed