Abstract
High spin states in90Tc have been studied via the58Ni (35Cl, 2pn) 90Tc reaction at beam energy of 124 MeV. Twenty-six newγ-rays were observed, a new level scheme was established and spins were assigned. Two band-like structures were established up to about 20ħ with an excitation energy of 6–7 MeV. The band (B) shows collective characteristic at high spin. We suggest it to be of a quasi-particle configurationπg9/2⊗vf 5/2.
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This work was funded by the National Natural Science Foundation of China.