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PARK, Joochun
희귀 핵 연구단
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Coulomb excitation of the vertical bar T-z vertical bar=1/2, A=23 mirror pair

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Title
Coulomb excitation of the vertical bar T-z vertical bar=1/2, A=23 mirror pair
Author(s)
Henderson, J.; Hackman, G.; Ruotsalainen, P.; Holt, J. D.; Stroberg, S. R.; Andreoiu, C.; Ball, G. C.; Bernier, N.; Bowry, M.; Caballero-Folch, R.; Cruz, S.; Varela, A. Diaz; Evitts, L. J.; Frederick, R.; Garnsworthy, A. B.; Holl, M.; Lassen, J.; Measures, J.; Olaizola, B.; O'Sullivan, E.; Paetkau, O.; Joochun Park; Smallcombe, J.; Svensson, C. E.; Whitmore, K.; Wu, C. Y.
Publication Date
2022-03
Journal
Physical Review c, v.105, no.3
Publisher
AMER PHYSICAL SOC
Abstract
Background: Electric-quadrupole (E2) strengths relate to the underlying quadrupole deformation of a nucleus and present a challenge for many nuclear theories. Mirror nuclei in the vicinity of the line of N = Z represent a convenient laboratory for testing deficiencies in such models, making use of the isospin symmetry of the systems. Purpose: Uncertainties associated with literature E2 strengths in Mg-23 are some of the largest in T-z = vertical bar 1/2 vertical bar nuclei in the sd shell. The purpose of the present paper is to improve the precision with which these values are known, to enable better comparison with theoretical models. Methods: Coulomb-excitation measurements of Mg-23 and Na-23 were performed at the TRIUMF-ISAC facility using the TIGRESS spectrometer. They were used to determine the E2 matrix elements of mixed E2/M1 transitions. Results: Reduced E2 transition strengths, B(E2), were extracted for Mg-23 and Na-23. Their precision was improved by factors of approximately 6 for both isotopes, while agreeing within uncertainties with previous measurements. Conclusions: A comparison was made with both shell-model and ab initio valence-space in-medium similarity renormalization group calculations. Valence-space in-medium similarity renormalization group calculations were found to underpredict the absolute E2 strength, in agreement with previous studies.
URI
https://pr.ibs.re.kr/handle/8788114/11982
DOI
10.1103/PhysRevC.105.034332
ISSN
2469-9985
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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