Collective band structures in neutron-rich Tc106,107

The high spin states of neutron-rich Tc-106,Tc-107 nuclei have been reinvestigated by observing prompt gamma rays from the spontaneous fission of Cf-252. In Tc-106, a previously known collective band is expanded, and a new collective band is identified. In Tc-107, a collective band based on the pi 5/2(-)[303] orbital is confirmed and extended. Inconsistencies in the configuration assignments for positive parity bands in Tc-105,Tc-107 in the previous reports are clarified. The spins and parities as well as the configurations for the two bands in Tc-106 are assigned according to the angular momentum alignments and g-factor calculations. Other characteristics for the observed bands are discussed.