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Mirrored one-nucleon knockout reactions to the Tz=±32 A=53 mirror nuclei

Milne, SA, Bentley, MA, Simpson, EC, Dodsworth, P, Baugher, T, Bazin, D, Berryman, JS, Bruce, AM, Davies, PJ, Aa. Diget, C , Gade, A, Henry, TW, Iwasaki, H, Lemasson, A, Lenzi, SM, McDaniel, S, Napoli, DR, Nichols, AJ, Ratkiewicz, A, Scruton, L, Stroberg, SR, Tostevin, JA, Weisshaar, D, Wimmer, K and Winkler, R (2016) Mirrored one-nucleon knockout reactions to the Tz=±32 A=53 mirror nuclei Physical Review C: Nuclear Physics, 93 (2), 024318.

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Abstract

Background: The study of excited states in mirror nuclei allows us to extract information on charge-dependent (i.e., isospin-nonconserving) interactions in nuclei. Purpose: To extend previous studies of mirror nuclei in the f7/2 region, investigating charge symmetry breaking of the strong nuclear force. Methods: γ-ray spectroscopy has been performed for the mirror (Tz= ±3/2) pair 53Ni and 53Mn, produced via mirrored one-nucleon knockout reactions. Results: Several new transitions have been identified in 53Ni from which a new level scheme has been constructed. Cross sections for knockout have been analyzed and compared with reaction model calculations where evidence is found for knockout from high-spin isomeric states. Mirror energy differences between isobaric analog states have been computed, compared to large scale shell-model calculations, and interpreted in terms of isospin-nonconserving effects. In addition, lifetimes for the long-lived J π = 5 /2 − 1 analog states in both 53Mn and 53Ni have been extracted through lineshape analysis, giving half-lives of t1/2 = 120 (14) ps and t1/2 = 198 (12) ps,respectively. Conclusions: The inclusion of a set of isovector isospin-nonconserving matrix elements to the shell-model calculations gave the best agreement with the experimental data.

Item Type: Article
Subjects : subj_Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Milne, SA
Bentley, MA
Simpson, EC
Dodsworth, P
Baugher, T
Bazin, D
Berryman, JS
Bruce, AM
Davies, PJ
Aa. Diget, C
Gade, A
Henry, TW
Iwasaki, H
Lemasson, A
Lenzi, SM
McDaniel, S
Napoli, DR
Nichols, AJ
Ratkiewicz, A
Scruton, L
Stroberg, SR
Tostevin, JA
Weisshaar, D
Wimmer, K
Winkler, R
Date : 24 February 2016
Identification Number : 10.1103/PhysRevC.93.024318
Copyright Disclaimer : ©2016 American Physical Society
Related URLs :
Additional Information : ©2016 American Physical Society
Depositing User : Symplectic Elements
Date Deposited : 09 Mar 2016 14:45
Last Modified : 31 Oct 2017 18:05
URI: http://epubs.surrey.ac.uk/id/eprint/810049

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