Physics Letters B (Apr 2018)
Identification of significant E0 strength in the 22+→21+ transitions of 58,60,62Ni
- L.J. Evitts,
- A.B. Garnsworthy,
- T. Kibédi,
- J. Smallcombe,
- M.W. Reed,
- B.A. Brown,
- A.E. Stuchbery,
- G.J. Lane,
- T.K. Eriksen,
- A. Akber,
- B. Alshahrani,
- M. de Vries,
- M.S.M. Gerathy,
- J.D. Holt,
- B.Q. Lee,
- B.P. McCormick,
- A.J. Mitchell,
- M. Moukaddam,
- S. Mukhopadhyay,
- N. Palalani,
- T. Palazzo,
- E.E. Peters,
- A.P.D. Ramirez,
- S.R. Stroberg,
- T. Tornyi,
- S.W. Yates
Affiliations
- L.J. Evitts
- Physical Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3, Canada; Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom
- A.B. Garnsworthy
- Physical Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3, Canada; Corresponding author.
- T. Kibédi
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- J. Smallcombe
- Physical Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3, Canada
- M.W. Reed
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- B.A. Brown
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
- A.E. Stuchbery
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- G.J. Lane
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- T.K. Eriksen
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- A. Akber
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- B. Alshahrani
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia; Department of Physics, King Khaled University, Abha, Saudi Arabia
- M. de Vries
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- M.S.M. Gerathy
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- J.D. Holt
- Physical Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3, Canada
- B.Q. Lee
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- B.P. McCormick
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- A.J. Mitchell
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- M. Moukaddam
- Physical Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3, Canada
- S. Mukhopadhyay
- Departments of Chemistry and Physics & Astronomy, University of Kentucky, Lexington, KY, 40506-0055, USA
- N. Palalani
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- T. Palazzo
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- E.E. Peters
- Departments of Chemistry and Physics & Astronomy, University of Kentucky, Lexington, KY, 40506-0055, USA
- A.P.D. Ramirez
- Departments of Chemistry and Physics & Astronomy, University of Kentucky, Lexington, KY, 40506-0055, USA
- S.R. Stroberg
- Physical Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., V6T 2A3, Canada
- T. Tornyi
- Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
- S.W. Yates
- Departments of Chemistry and Physics & Astronomy, University of Kentucky, Lexington, KY, 40506-0055, USA
- Journal volume & issue
-
Vol. 779
pp. 396 – 401
Abstract
The E0 transition strength in the 22+→21+ transitions of 58,60,62Ni have been determined for the first time following a series of measurements at the Australian National University (ANU) and the University of Kentucky (UK). The CAESAR Compton-suppressed HPGe array and the Super-e solenoid at ANU were used to measure the δ(E2/M1) mixing ratio and internal conversion coefficient of each transition following inelastic proton scattering. Level half-lives, δ(E2/M1) mixing ratios and γ-ray branching ratios were measured at UK following inelastic neutron scattering. The new spectroscopic information was used to determine the E0 strengths. These are the first 2+→2+ E0 transition strengths measured in nuclei with spherical ground states and the E0 component is found to be unexpectedly large; in fact, these are amongst the largest E0 transition strengths in medium and heavy nuclei reported to date. Keywords: Electric monopole (E0) transitions, Internal conversion, Mixing ratios, Nuclear structure
