β decay of neutron-rich Cu76 and the structure of Zn76

U. Silwal, J. A. Winger, S. V. Ilyushkin, K. P. Rykaczewski, C. J. Gross, J. C. Batchelder, L. Cartegni, I. G. Darby, R. Grzywacz, A. Korgul, W. Królas, S. N. Liddick, C. Mazzocchi, A. J. Mendez, II, S. Padgett, M. M. Rajabali, D. P. Siwakoti, D. Shapira, D. W. Stracener, and E. F. Zganjar
Phys. Rev. C 106, 044311 – Published 13 October 2022

Abstract

The β decay of Cu76 to the levels of Zn76 was studied at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Lab (ORNL). A purified Cu76 beam was developed and data were recorded for the decay of the A=76 decay chain using four high-purity germanium (HPGe) clover detectors at the Low-energy Radioactive Ion Beam Spectroscopy Station (LeRIBSS). In this measurement, data on γ-ray emission following β decay, including βγ and γγ coincidences, were collected and γγ spectra were analyzed to identify the statistically significant coincidences. From this analysis, we propose a level scheme for Zn76 which contains a total of 59 energy levels up to 6.0 MeV containing 105 γ rays. We have identified an additional 53 γ rays associated with this decay which could not be place in the decay scheme due to insufficient coincidence information or no energy match to identified levels. No γ rays from states in Zn75 fed in the delayed-neutron branch were observed even though other γ rays in the A=75 decay chain were observed. Spin and parity assignments are proposed for some levels based on comparison to systematics and shell model calculations.

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  • Received 2 March 2020
  • Revised 7 July 2022
  • Accepted 2 September 2022

DOI:https://doi.org/10.1103/PhysRevC.106.044311

©2022 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

U. Silwal1,2,*, J. A. Winger1, S. V. Ilyushkin1, K. P. Rykaczewski3, C. J. Gross3, J. C. Batchelder4, L. Cartegni5, I. G. Darby5, R. Grzywacz3,5, A. Korgul5,6,7, W. Królas8,7, S. N. Liddick5,9, C. Mazzocchi5,6,7, A. J. Mendez, II10, S. Padgett5, M. M. Rajabali5,11, D. P. Siwakoti1, D. Shapira3, D. W. Stracener3, and E. F. Zganjar12

  • 1Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
  • 2Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82701, USA
  • 3Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 4Department of Nuclear Engineering, University of California, Berkeley, Berkeley, California 94702, USA
  • 5Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 6Faculty of Physics, University of Warsaw, Warsaw PL 02-093, Poland
  • 7Joint Institute for Nuclear Physics and Applications, Oak Ridge, Tennessee 37831, USA
  • 8Institute of Nuclear Physics, Polish Academy of Sciences, Kraków PL 31-342, Poland
  • 9National Superconduction Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 10Department of Chemistry and Physics, Campbell University, Buies Creek, North Carolina 27506, USA
  • 11Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505, USA
  • 12Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA

  • *usilwal@uncc.edu

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Vol. 106, Iss. 4 — October 2022

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