Nuclear structure of Ge76 from inelastic neutron scattering measurements and shell model calculations

S. Mukhopadhyay, B. P. Crider, B. A. Brown, S. F. Ashley, A. Chakraborty, A. Kumar, M. T. McEllistrem, E. E. Peters, F. M. Prados-Estévez, and S. W. Yates
Phys. Rev. C 95, 014327 – Published 25 January 2017

Abstract

The low-lying, low-spin levels of Ge76 were studied with the (n,nγ) reaction. Gamma-ray excitation function measurements were performed at incident neutron energies from 1.6 to 3.7 MeV, and γ-ray angular distributions were measured at neutron energies of 3.0 and 3.5 MeV. From these measurements, level spins, level lifetimes, γ-ray intensities, and multipole mixing ratios were determined. No evidence for a number of previously placed levels was found. Below 3.3 MeV, many new levels were identified, and the level scheme was re-evaluated. The B(E2) values support low-lying band structure. The 2+ mixed-symmetry state has been identified for the first time. A comparison of the level characteristics with large-scale shell model calculations yielded excellent agreement.

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  • Received 25 September 2016
  • Revised 4 December 2016

DOI:https://doi.org/10.1103/PhysRevC.95.014327

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. Mukhopadhyay1,2,*, B. P. Crider1, B. A. Brown3,4, S. F. Ashley1,2, A. Chakraborty1,2,†, A. Kumar1,2, M. T. McEllistrem1, E. E. Peters2, F. M. Prados-Estévez1,2, and S. W. Yates1,2

  • 1Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055, USA
  • 2Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
  • 3National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 4Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

  • *smukh3@uky.edu
  • Present address: Department of Physics, Siksha Bhavana, Visva-Bharati, Santiniketan 731235, India.

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Issue

Vol. 95, Iss. 1 — January 2017

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