Large Isospin Asymmetry in 
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 Mirror Gamow-Teller

Lee, J.; Xu, X. X.; Kaneko, Kazunari; Sun, Y.; Lin, C. J.; Sun, L. J.; Liang, Pengfei; Li, Z. H.; Li, J.; Wu, H. Y.; Fang, Deqing; Wang, J. S.; Yang, Y.; Yuan, C. X.; Lam, Y. H.; Wang, Y. T.; Wang, K.; Wang, J. G.; Ma, J. B.; Liu, J. J.; Li, P. J.; Zhao, Qiong; Yang, L.; Ma, N. R.; Wang, D. X.; Zhong, F. P.; Zhong, Shiyi; Feng, Yan; Jia, H. M.; Wen, Peiwei; Pan, Min; Zang, H. L.; Wang, X.; Wu, C. G.; Luo, D. W.; Wang, H. W.; Li, C.; Shi, C. Z.; Nie, M.; Li, X. F.; Li, H.; Ma, P.; Shi, Gen-hua; Jin, S.; Huang, M. R.; Bai, Zhiyong; Zhou, Yuanjing; Ma, W. H.; Duan, F. F.; Jin, Shichao; Gao, Q.; Zhou, X. H.; Hu, Zhengguo; Wang, M.; Liu, M. L.; Chen, R. F.; Ma, X. W.

doi:10.1103/physrevlett.125.192503

Cited by 23 publications

(50 citation statements)

References 30 publications

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“…Large asymmetries in mirror Gamow-Teller transitions have been associated with transitions involving halo states [6]. So as to systematically study the isospin symmetry breaking, β decays of the sd shell mirror nuclei near the proton drip line have been investigated [7][8][9][10][11][12][13][14][15]. The largest value of mirror asymmetry (δ = 209(96)%) in low-lying states in 22 Si/ 22 O was found in a recent paper [8], supporting the proton halo in 22 Al.…”

Section: Introductionmentioning

confidence: 99%

“…So as to systematically study the isospin symmetry breaking, β decays of the sd shell mirror nuclei near the proton drip line have been investigated [7][8][9][10][11][12][13][14][15]. The largest value of mirror asymmetry (δ = 209(96)%) in low-lying states in 22 Si/ 22 O was found in a recent paper [8], supporting the proton halo in 22 Al. For the extremely proton-rich phosphorus isotopes, the mirror asymmetry parameters in 26 P/ 26 Na partners was observed to be 51(10)% [14].…”

Section: Introductionmentioning

confidence: 99%

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β-Delayed γ Emissions of 26P and Its Mirror Asymmetry

et al. 2021

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The study of the origin of asymmetries in mirror β decay is extremely important to understand the fundamental nuclear force and the nuclear structure. The experiment was performed at the National Laboratory of Heavy Ion Research Facility in Lanzhou (HIRFL) to measure the β-delayed γ rays of 26P by silicon array and Clover-type high-purity Germanium (HPGe) detectors. Combining with results from the β decay of 26P and its mirror nucleus 26Na, the mirror asymmetry parameter δ ( ≡ft+/ft−− 1) was determined to be 46(13)% for the transition feeding the first excited state in the daughter nucleus. Our independent results support the conclusion that the large mirror asymmetry is close to the proton halo structure in 26P.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

β-Delayed γ Emissions of 26P and Its Mirror Asymmetry

et al. 2021

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“…The abrupt change of the neutron drip line also manifests the evolution of the N = 20 shell. Since 29 F and 30 Ne are the two lightest bound nuclei with N = 20, a systematic study on the F and Ne isotopes around 29 F and 30 Ne is significant.…”

Section: Introductionmentioning

confidence: 99%

“…The shell model is an essential tool for the systematic understanding of the nuclear structure. Recently, it has been employed in describing light, proton-rich, exotic nuclei and the related isospin symmetry breaking [30][31][32][33], interpreting the shell evolution in the medium mass region [34,35], reproducing isomeric states in the medium [36,37] and heavy nuclei [38][39][40], and investigating the α-decay properties of heavy-mass nuclei [41,42].…”

Section: Introductionmentioning

confidence: 99%

“…On this basis, the neutron excitation across the N = 20 shell is rather crucial. Fukunishi et al employed an interaction in the model space, including the whole sd shell and the 0f 7/2 and 1p 3/2 orbits, and calculated some properties of 30 Ne, ensuring the necessity of cross-shell excitation [43]. The SDPF-M interaction, proposed by Utsuno et al, was presented with its results on the average neutron occupancy in the pf shell of even-mass [26][27][28][29][30][31][32][33][34] Ne [44].…”

Section: Introductionmentioning

confidence: 99%

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Cross-Shell Excitation in F and Ne Isotopes around N = 20

Liu

Yuan

2021

Symmetry

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Within the framework of the configuration–interaction shell model, the present work applies three effective interactions to investigate the effects of the cross-shell excitation on F and Ne isotopes around N = 20, which are significantly proton–neutron asymmetric, and have different properties compared with the proton–neutron symmetric nuclei. It is shown that cross-shell excitation is necessary in order to reproduce separation energies, neutron drip lines, and low-energy levels of these isotopes. Furthermore, the cross-shell excitation of (0–5)ħω is suggested to be important in the description of 29F and 30Ne. However, the three interactions are insufficient in describing the bound structure of 29,31Ne, and provide inconsistent shell structures and evolutions in the target nuclei. Their cross-shell interactions are suggested to be improved.

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Beta Decay of Halo Nuclei

Riisager¹

2022

Handbook of Nuclear Physics

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Large Isospin Asymmetry in Si22/O22 Mirror Gamow-Teller

Cited by 23 publications

References 30 publications

β-Delayed γ Emissions of 26P and Its Mirror Asymmetry

β-Delayed γ Emissions of 26P and Its Mirror Asymmetry

Cross-Shell Excitation in F and Ne Isotopes around N = 20

Beta Decay of Halo Nuclei

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