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Article: Observation of a Strongly Isospin-Mixed Doublet in Si26 via β-Delayed Two-Proton Decay of P26

TitleObservation of a Strongly Isospin-Mixed Doublet in Si26 via β-Delayed Two-Proton Decay of P26
Authors
Issue Date8-Dec-2022
PublisherAmerican Physical Society
Citation
Physical Review Letters, 2022, v. 129, n. 24 How to Cite?
Abstract

β decay of proton-rich nuclei plays an important role in exploring isospin mixing. The β decay of 26P at the proton drip line is studied using double-sided silicon strip detectors operating in conjunction with high-purity germanium detectors. The T=2 isobaric analog state (IAS) at 13 055 keV and two new high-lying states at 13 380 and 11 912 keV in 26Si are unambiguously identified through β-delayed two-proton emission (β2p). Angular correlations of two protons emitted from 26Si excited states populated by 26P β decay are measured, which suggests that the two protons are emitted mainly sequentially. We report the first observation of a strongly isospin-mixed doublet that deexcites mainly via two-proton decay. The isospin mixing matrix element between the 26Si IAS and the nearby 13 380-keV state is determined to be 130(21) keV, and this result represents the strongest mixing, highest excitation energy, and largest level spacing of a doublet ever observed in β-decay experiments.


Persistent Identifierhttp://hdl.handle.net/10722/341638
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 3.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, JJ-
dc.contributor.authorXu, XX-
dc.contributor.authorSun, LJ-
dc.contributor.authorYuan, CX-
dc.contributor.authorKaneko, K-
dc.contributor.authorSun, Y-
dc.contributor.authorLiang, PF-
dc.contributor.authorWu, HY-
dc.contributor.authorShi, GZ-
dc.contributor.authorLin, CJ-
dc.contributor.authorLee, J-
dc.contributor.authorWang, SM-
dc.contributor.authorQi, C-
dc.contributor.authorLi, JG-
dc.contributor.authorLi, HH-
dc.contributor.authorXayavong, L-
dc.contributor.authorLi, ZH-
dc.contributor.authorLi, PJ-
dc.contributor.authorYang, YY-
dc.contributor.authorJian, H-
dc.contributor.authorGao, YF-
dc.contributor.authorFan, R-
dc.contributor.authorZha, SX-
dc.contributor.authorDai, FC-
dc.contributor.authorZhu, HF-
dc.contributor.authorLi, JH-
dc.contributor.authorChang, ZF-
dc.contributor.authorQin, SL-
dc.contributor.authorZhang, ZZ-
dc.contributor.authorCai, BS-
dc.contributor.authorChen, RF-
dc.contributor.authorWang, JS-
dc.contributor.authorWang, DX-
dc.contributor.authorWang, K-
dc.contributor.authorDuan, FF-
dc.contributor.authorLam, YH-
dc.contributor.authorMa, P-
dc.contributor.authorGao, ZH-
dc.contributor.authorHu, Q-
dc.contributor.authorBai, Z-
dc.contributor.authorMa, JB-
dc.contributor.authorWang, JG-
dc.contributor.authorWu, CG-
dc.contributor.authorLuo, DW-
dc.contributor.authorJiang, Y-
dc.contributor.authorLiu, Y-
dc.contributor.authorHou, DS-
dc.contributor.authorLi, R-
dc.contributor.authorMa, NR-
dc.contributor.authorMa, WH-
dc.contributor.authorYu, GM-
dc.contributor.authorPatel, D-
dc.contributor.authorJin, SY-
dc.contributor.authorWang, YF-
dc.contributor.authorYu, YC-
dc.contributor.authorHu, LY-
dc.contributor.authorWang, X-
dc.contributor.authorZang, HL-
dc.contributor.authorWang, KL-
dc.contributor.authorDing, B-
dc.contributor.authorZhao, QQ-
dc.contributor.authorYang, L-
dc.contributor.authorWen, PW-
dc.contributor.authorYang, F-
dc.contributor.authorJia, HM-
dc.contributor.authorZhang, GL-
dc.contributor.authorPan, M-
dc.contributor.authorWang, XY-
dc.contributor.authorSun, HH-
dc.contributor.authorXu, HS-
dc.contributor.authorZhou, XH-
dc.contributor.authorZhang, YH-
dc.contributor.authorHu, ZG-
dc.contributor.authorWang, M-
dc.contributor.authorLiu, ML-
dc.contributor.authorOng, HJ-
dc.contributor.authorYang, WQ-
dc.contributor.authorRIBLL Collaboration,-
dc.date.accessioned2024-03-20T06:57:56Z-
dc.date.available2024-03-20T06:57:56Z-
dc.date.issued2022-12-08-
dc.identifier.citationPhysical Review Letters, 2022, v. 129, n. 24-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/341638-
dc.description.abstract<p>β decay of proton-rich nuclei plays an important role in exploring isospin mixing. The β decay of 26P at the proton drip line is studied using double-sided silicon strip detectors operating in conjunction with high-purity germanium detectors. The T=2 isobaric analog state (IAS) at 13 055 keV and two new high-lying states at 13 380 and 11 912 keV in 26Si are unambiguously identified through β-delayed two-proton emission (β2p). Angular correlations of two protons emitted from 26Si excited states populated by 26P β decay are measured, which suggests that the two protons are emitted mainly sequentially. We report the first observation of a strongly isospin-mixed doublet that deexcites mainly via two-proton decay. The isospin mixing matrix element between the 26Si IAS and the nearby 13 380-keV state is determined to be 130(21) keV, and this result represents the strongest mixing, highest excitation energy, and largest level spacing of a doublet ever observed in β-decay experiments.<br></p>-
dc.languageeng-
dc.publisherAmerican Physical Society-
dc.relation.ispartofPhysical Review Letters-
dc.titleObservation of a Strongly Isospin-Mixed Doublet in Si26 via β-Delayed Two-Proton Decay of P26-
dc.typeArticle-
dc.identifier.doi10.1103/PhysRevLett.129.242502-
dc.identifier.scopuseid_2-s2.0-85143695450-
dc.identifier.volume129-
dc.identifier.issue24-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000902152000002-
dc.identifier.issnl0031-9007-

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