Proposed Chiral Doublet Bands in 98Tc.

High spin states in odd-odd98 Tc nuclei are studied by in-beam g-ray spectroscopy with the 96Zr(6Li, 4n) fusion-evaporation reaction at a beam energy of 35 MeV. The previous level scheme is updated. A band based on 1090.7 keV is expanded, and another band based on 1920.6 keV is newly identified. The observed two negative parity bands in 98Tc are proposed to be a pair of chiral doublet bands with the configuration pg9/2 [?] nh11/2. The evidence supporting the assignment of the chiral doublet bands is discussed. Signature splitting and signature inversion are observed in the pg9/2 [?] nh11/2 band in 98Tc. [ABSTRACT FROM AUTHOR]