Identification of Significant E0 Strength in the 2₂⁺ → 2₁⁺ Transitions of ^58,60,62Ni

Authors

L. J. Evitts, TRUIMF, Canada
A. B. Garnsworthy, TRUIMF, Canada
T. Kibédi, The Australian National University, Australia
J. Smallcombe, TRUIMF, Canada
M. W. Reed, The Australian National University, Australia
B. A. Brown, Michigan State University
A. E. Stuchbery, The Australian National University, Australia
G. J. Lane, The Australian National University, Australia
T. K. Eriksen, The Australian National University, Australia
A. Akber, The Australian National University, Australia
B. Alshahrani, The Australian National University, Australia
M. de Vries, The Australian National University, Australia
M. S. M. Gerathy, The Australian National University, Australia
J. D. Holt, TRUIMF, Canada
B. Q. Lee, University of Oxford, UK
B. P. McCormick, The Australian National University, Australia
A. J. Mitchell, The Australian National University, Australia
M. Moukaddam, University of Surrey, UK
Sharmistha Mukhopadhyay, University of KentuckyFollow
N. Palalani, The Australian National University, Australia
T. Palazzo, The Australian National University, Australia
Erin E. Peters, University of KentuckyFollow
Anthony Paul D. Ramirez, University of KentuckyFollow
S. R. Stroberg, Reed College
T. Tornyi, The Australian National University, Australia
Steven W. Yates, University of KentuckyFollow

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.

Document Type

Article

Publication Date

4-10-2018

Notes/Citation Information

Published in Physics Letters B, v. 779, p. 396-401.

© 2018 The Author(s). Published by Elsevier B.V.

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.physletb.2018.01.076

Funding Information

Funded by SCOAP³.

This work was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC); the National Science Foundation, Grants No. PHY-1404442 and PHY-1606890; and by the Australian Research Council Discovery Grants DP140102986 and FT100100991. TRIUMF receives funding via a contribution agreement through the National Research Council Canada.

Repository Citation

Evitts, L. J.; Garnsworthy, A. B.; Kibédi, T.; Smallcombe, J.; Reed, M. W.; Brown, B. A.; Stuchbery, A. E.; Lane, G. J.; Eriksen, T. K.; Akber, A.; Alshahrani, B.; de Vries, M.; Gerathy, M. S. M.; Holt, J. D.; Lee, B. Q.; McCormick, B. P.; Mitchell, A. J.; Moukaddam, M.; Mukhopadhyay, Sharmistha; Palalani, N.; Palazzo, T.; Peters, Erin E.; Ramirez, Anthony Paul D.; Stroberg, S. R.; Tornyi, T.; and Yates, Steven W., "Identification of Significant E0 Strength in the 2₂⁺ → 2₁⁺ Transitions of ^58,60,62Ni" (2018). Chemistry Faculty Publications. 126.
https://uknowledge.uky.edu/chemistry_facpub/126