Abstract
Excited states in 142Pm are investigated via the128Te(19F, 5n)142Pm reaction at beamenergies from 75 to 95 MeV by using techniques of in-beam γ-rayspectroscopy. Measurements of γ-ray excitation function, X–γ andγ–γ–t coincidences are performed with 10 BGO(AC)HPGe detectors.Decay of the previously known 67-μs isomer in 142Pm is observedand added into the new level scheme. This isomer is definitely placedat the excitation energy of 2828.5 keV. The spin of this isomer issuggested to be 13 ℏ according to the measured γ-ray anisotropies.
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