In-beam ?-ray spectroscopy in the ground-state proton emitter

In-beam ?-ray spectroscopy in the ground-state proton emitter

C. J. Gross,Y. A. Akovali,C. Baktash,J. C. Batchelder,C. R. Bingham,M. P. Carpenter,C. N. Davids,T. Davinson,D. Ellis,A. Galindo-Uribarri,T. N. Ginter,R. Grzywacz,R. V. F. Janssens,J. W. Johnson,J. F. Liang,C. J. Lister,J. Mas,B. D. Macdonald,S. D. Paul,A. Piechaczek,D. C. Radford,W. Reviol,K. Rykaczewski,W. Satuła,D. Seweryniak,D. Shapira,K. S. Toth,W. Weintraub,P. J. Woods,C.-H. Yu,E. F. Zganjar,J. Uusitalo;C. J. Gross;Y. A. Akovali;C. Baktash;J. C. Batchelder;C. R. Bingham;M. P. Carpenter;C. N. Davids;T. Davinson;D. Ellis;A. Galindo-Uribarri;T. N. Ginter;R. Grzywacz;R. V. F. Janssens;J. W. Johnson;J. F. Liang;C. J. Lister;J. Mas;B. D. Macdonald;S. D. Paul;A. Piechaczek;D. C. Radford;W. Reviol;K. Rykaczewski;W. Satuła;D. Seweryniak;D. Shapira;K. S. Toth;W. Weintraub;P. J. Woods;C.-H. Yu;E. F. Zganjar;J. Uusitalo;
Exotic nuclei and atomic masses (ENAM 98) 1998 pp. 1-
130
uusitalo1998exoticin-beam

Abstract

Gamma-raytransitions in the ground-stateproton emitter 113Cs have been identified using the reaction 58Ni(58Ni,p2n) at a beam energy of 230 MeV and the recoil decay tagging technique. The first experiment was done using the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility where γ-ray transitions were detected with 6 Clover and 5 Duet Gedetectors. A follow-up experiment using the GAMMASPHERE-FMA combination at Argonne National Laboratory was performed. Ninety-six Ge and 4 LEPs detectors were used to record recoil-γγ coincidences. Both experiments employed standard recoil mass separation techniques which resulted in the implantation of A=113 reaction products into a double-sided silicon-strip detector. By gating on the energy of the emitted proton and decay time, the correlation between γ rays and the implanted 113Cs could be observed. Initial analysis and comparison with energy level systematics of the Cs isotopes reveal a decay sequence based on the h112 bandhead. Further analysis is required to determine the decay of this sequence to the expected positive parity ground state.

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