Enhancement of M1 Transition Rates at High Spin in 90Mo
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Abstract
High spin states in 90Mo have been populated through the 59Co (35Cl,2p2n) 90Mo reaction at beam energy of 116 MeV. Level lifetimes of the positive-parity decay sequence are measured by using the Doppler shift attenuation method. It is observed that the M1 transition strengths show a substantial enhancement at high spin. This behaviour may be related to occupation of high Ω orbitals by a pair of g9/2 protons. A deformed shape with oblate is suggested above the 13+ state.
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References
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