Search for High-Spin Isomer in ^142Pr by RI Beam Induced Fusion Reaction at RCNP
Abstract
Systematic studies of high-spin shape isomers in N=83 isotones provided interesting information on the properties of pairing interactions. The high-spin isomer in ^142Pr, which is not effectively populated by any combinations of stable beams and targets, was searched for in the fusion reaction induced by RI beam, ^130Te(^17N, 5n)^142Pr, at RCNP, Osaka Univ. The ^17N beam was produced in the ^9Be (^18O, ^17N) ^10B reaction at 9.1 MeV/u. Gamma-rays at the secondary target were detected by a RCNP Ge array consisting of 14 HPGe detectors. Contaminant γ-rays due to β-decay of ^17N and the natural activities could be eliminated with the coincidence requirement that the ^17N particles were detected in the PPAC. The ^17N beam of ∼10^5 pps has been obtained with energy of ∼4.2 MeV/u. In the preliminary analyses, clearly seen were the γ-rays deexciting the states with spins up to 21/2 in ^141Pr and the reported γ-rays after the decay of (9+) isomer with T1/2=61 ns in ^142Pr. The results of γγ coincidence analyses searching for the isomers will be presented.
- Publication:
-
APS Meeting Abstracts
- Pub Date:
- October 2009
- Bibcode:
- 2009APS..HAW.LL011T