Study of High Spin Isomer and Its Decay Level Scheme of Doubly Odd 144Pm Nucleus
- Received Date: 1995-05-05
Abstract: The high spin isomer (HSI) in 144Pm was produced and separated by using the high spin isomer beam facility. Based on the measurements of γ-γ coincidence, γ-ray excitation functions, and isotropies, the decay level scheme of the HSI was established for the first time including 19 new high spin levels and 29 new γ-transitions assigned to 144Pm by this work. The HSI-γ correlation measurement indicated that the half-life of the HSI is longer than 2 μs. From the systematic comparisons and the deformed independent particle model calculations for the N=83 isotopes, the most possible particle configuration of π(1h11/22d5/2)υ(1i13/21h9/22f7/2) and the spin-parity of J*=27+ were assigned to this HSI corresponding to an oblate deformation with β=-0.18.





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