The beta -decay properties of neutron-rich fission fragments of Cu, Zn, and Ga isotopes were studied at the Holifield Radioactive Ion Beam Facility. Beams of 75-79Cu, 79-81Zn, and 83-85Ga were formed and delivered to two new end-stations at the facility. The Low-energy Radioactive Ion Beam Spectroscopy Station is a traditional on-line low energy (200 keV) beam line with 4 clover Ge detectors, two half-cylindrical plastic \beta -detectors, and a moving tape collector. In addition, many of the beams were accelerated to above 2 MeV/u and delivered to a micro-channel plate and transmission ion chamber located just in front of the same detector setup. In both cases, fine adjustment of an isobar separator was used to enhance the isotope of interest. Excited levels in the daughters and \beta -delayed neutron branching ratios were measured and used to confirm isotope identification. The decays from 79Cu and 85Ga were observed for the first time as was the 84Ge 21+ level populated by \beta and beta n decay channels.

Decay spectroscopy of 75−79 Cu, 79−81 Zn, and 83−85 Ga / C. J. Gross, J. A. Winger, S. V. Ilyushkin, K. P. Rykaczewski, S. N. Liddick, I. G. Darby, R. K. Grzywacz, C. R. Bingham, D. Shapira, C. Mazzocchi, S. Padgett, M. M. Rajabali, L. Cartegni, E. F. Zganjar, A. Piechaczek, J. C. Batchelder, J. H. Hamilton, C. T. Goodin, A. Korgul, W. Krolas. - In: ACTA PHYSICA POLONICA B. - ISSN 0587-4254. - 40:3(2009), pp. 447-455.

Decay spectroscopy of 75−79 Cu, 79−81 Zn, and 83−85 Ga

C. Mazzocchi;
2009

Abstract

The beta -decay properties of neutron-rich fission fragments of Cu, Zn, and Ga isotopes were studied at the Holifield Radioactive Ion Beam Facility. Beams of 75-79Cu, 79-81Zn, and 83-85Ga were formed and delivered to two new end-stations at the facility. The Low-energy Radioactive Ion Beam Spectroscopy Station is a traditional on-line low energy (200 keV) beam line with 4 clover Ge detectors, two half-cylindrical plastic \beta -detectors, and a moving tape collector. In addition, many of the beams were accelerated to above 2 MeV/u and delivered to a micro-channel plate and transmission ion chamber located just in front of the same detector setup. In both cases, fine adjustment of an isobar separator was used to enhance the isotope of interest. Excited levels in the daughters and \beta -delayed neutron branching ratios were measured and used to confirm isotope identification. The decays from 79Cu and 85Ga were observed for the first time as was the 84Ge 21+ level populated by \beta and beta n decay channels.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/69891
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