تقرير
Coulomb excitation of the $\left|T_z\right|=\frac{1}{2}$, $A=23$ mirror pair
| العنوان: | Coulomb excitation of the $\left|T_z\right|=\frac{1}{2}$, $A=23$ mirror pair |
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| المؤلفون: | 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., Park, J., Smallcombe, J., Svensson, C. E., Whitmore, K., Wu, C. Y. |
| المصدر: | Physical Review C 105 034332 (2022) |
| سنة النشر: | 2020 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | 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 \textsuperscript{23}Mg are some of the largest in $T_z=\left|\frac{1}{2}\right|$ nuclei in the $sd$-shell. The purpose of the present work is to improve the precision with which these values are known, to enable better comparison with theoretical models. Methods: Coulomb-excitation measurements of $^{23}$Mg and $^{23}$Na 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 \textsuperscript{23}Mg and \textsuperscript{23}Na. Their precision was improved by factors of approximately six for both isotopes, while agreeing within uncertainties with previous measurements. Conclusions: A comparison was made with both shell-model and {\it 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. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.105.034332 |
| الوصول الحر: | http://arxiv.org/abs/2005.03796Test |
| رقم الانضمام: | edsarx.2005.03796 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.105.034332 |
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