Updated β-decay measurement of neutron-rich Cu74

• Published in: Physical review. C 2018-09, Vol.98 (3)
• Main Authors: Tracy, Jr., J. L., Winger, J. A., Rasco, Bertis C., Silwal, U., Siwakoti, D. P., Rykaczewski, Krzysztof P., Grzywacz, R., Batchelder, J. C., Bingham, C. R., Brewer, Nathan T., Cartegni, L., Ciemny, A. A., Fijałkowska, A., Gross, C. J., Jost, C., Karny, M., Kolos, K., Korgul, A., Królas, W., Liu, Y., Madurga, M., Mazzocchi, C., Mendez, II, A. J., Miernik, K., Miller, D., Padgett, S., Paulauskas, S. V., Stracener, D. W., Wolińska-Cichocka, M., Rajabali, M. M., Zganjar, E. F.
• Format: Article
• Language: English
• Subjects: NUCLEAR PHYSICS AND RADIATION PHYSICS
• ISSN: 2469-9985; 2469-9993
• DOI: 10.1103/PhysRevC.98.034309

Here, the β decay of neutron-rich 74Cu has been studied at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. By using a high-resolution mass separator a purified 74Cu beam was obtained, thus allowing decay through its isobar chain to stable 74Ge without any decay chain member dominating. A total of 170γ rays were associated with 74Cuβ decay with 111 placed in the 74Zn level scheme. Updated β feeding intensities and estimated log(ft) values are presented, and new Jπ assignments are proposed using shell model calculations. The progression of simulated total absorption γ-ray spectroscopy (TAGS) based on proposed levels and β-feeding values from previous measurements to this evaluation are presented and demonstrate the need for a TAGS measurements for this and similar decays.