First observation of pseudospin-chiral triplet bands with pure proton configuration

W. B. Zeng; C. Liu; S. Y. Wang; B. Qi; R. A. Bark; H. Jia; J. Meng; S. Q. Zhang; S. M. Wyngaardt; Q. B. Chen; Z. Q. Li; S. Wang; D. P. Sun; R. J. Guo; X. C. Han; W. Z. Xu; H. Hua; X. Q. Li; C. G. Li; R. Han; B. H. Sun; L. H. Zhu; T. D. Bucher; B. V. Kheswa; N. Khumalo; E. A. Lawrie; J. J. Lawrie; K. L. Malatji; L. Msebi; J. Ndayishimye; J. F. Sharpey-Schafer; O. Shirinda; M. Wiedeking; T. Dinoko; S. S. Ntshangase

doi:10.1103/v667-vy2p

First observation of pseudospin-chiral triplet bands with pure proton configuration

W. B. Zeng
, C. Liu
, S. Y. Wang
, B. Qi
, R. A. Bark
, H. Jia
, J. Meng
, S. Q. Zhang
, S. M. Wyngaardt
, Q. B. Chen
, Z. Q. Li
, S. Wang
, D. P. Sun
, R. J. Guo
, X. C. Han
, W. Z. Xu
, H. Hua
, X. Q. Li
, C. G. Li
, R. Han

B. H. Sun, L. H. Zhu, T. D. Bucher, B. V. Kheswa, N. Khumalo, E. A. Lawrie, J. J. Lawrie, K. L. Malatji, L. Msebi, J. Ndayishimye, J. F. Sharpey-Schafer, O. Shirinda, M. Wiedeking, T. Dinoko, S. S. Ntshangase

Research output: Contribution to journal › Review article › peer-review

Abstract

High-spin states of ⁸¹Br were populated using the ⁸²Se(α, p4n) reaction. One positive-parity band and four negative-parity bands were observed. Based on the experimental characteristics of these bands, a pair of nearly degenerate three-quasiparticle bands with negative parity are interpreted as chiral doublet bands based on the π( f_5/2, p_3/2 )^-5πg² _9/2 configuration. The third three-quasiparticle band is interpreted as a pseudospin partner band, thereby forming pseudospin-chiral triplet bands in ⁸¹Br. The interpretation was supported by the relativistic density functional theory and the multiparticle plus rotor model calculations. The present work suggests a new chiral configuration in the nuclear system and reports the first observation of pseudospin-chiral triplet bands with a pure proton configuration.

Original language	English
Article number	034330
Journal	Physical Review C
Volume	112
Issue number	3
DOIs	https://doi.org/10.1103/v667-vy2p
Publication status	Published - 23 Sept 2025
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/v667-vy2p

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Zeng, W. B., Liu, C., Wang, S. Y., Qi, B., Bark, R. A., Jia, H., Meng, J., Zhang, S. Q., Wyngaardt, S. M., Chen, Q. B., Li, Z. Q., Wang, S., Sun, D. P., Guo, R. J., Han, X. C., Xu, W. Z., Hua, H., Li, X. Q., Li, C. G., ... Ntshangase, S. S. (2025). First observation of pseudospin-chiral triplet bands with pure proton configuration. Physical Review C, 112(3), Article 034330. https://doi.org/10.1103/v667-vy2p

@article{225a39a9dc054633971caff05f282bce,

title = "First observation of pseudospin-chiral triplet bands with pure proton configuration",

abstract = "High-spin states of 81Br were populated using the 82Se(α, p4n) reaction. One positive-parity band and four negative-parity bands were observed. Based on the experimental characteristics of these bands, a pair of nearly degenerate three-quasiparticle bands with negative parity are interpreted as chiral doublet bands based on the π( f5/2, p3/2 )-5πg2 9/2 configuration. The third three-quasiparticle band is interpreted as a pseudospin partner band, thereby forming pseudospin-chiral triplet bands in 81Br. The interpretation was supported by the relativistic density functional theory and the multiparticle plus rotor model calculations. The present work suggests a new chiral configuration in the nuclear system and reports the first observation of pseudospin-chiral triplet bands with a pure proton configuration.",

author = "Zeng, \{W. B.\} and C. Liu and Wang, \{S. Y.\} and B. Qi and Bark, \{R. A.\} and H. Jia and J. Meng and Zhang, \{S. Q.\} and Wyngaardt, \{S. M.\} and Chen, \{Q. B.\} and Li, \{Z. Q.\} and S. Wang and Sun, \{D. P.\} and Guo, \{R. J.\} and Han, \{X. C.\} and Xu, \{W. Z.\} and H. Hua and Li, \{X. Q.\} and Li, \{C. G.\} and R. Han and Sun, \{B. H.\} and Zhu, \{L. H.\} and Bucher, \{T. D.\} and Kheswa, \{B. V.\} and N. Khumalo and Lawrie, \{E. A.\} and Lawrie, \{J. J.\} and Malatji, \{K. L.\} and L. Msebi and J. Ndayishimye and Sharpey-Schafer, \{J. F.\} and O. Shirinda and M. Wiedeking and T. Dinoko and Ntshangase, \{S. S.\}",

note = "Publisher Copyright: {\textcopyright}2025 American Physical Society 2469-9985/2025/112(3)/034330(8)",

year = "2025",

month = sep,

day = "23",

doi = "10.1103/v667-vy2p",

language = "English",

volume = "112",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

Zeng, WB, Liu, C, Wang, SY, Qi, B, Bark, RA, Jia, H, Meng, J, Zhang, SQ, Wyngaardt, SM, Chen, QB, Li, ZQ, Wang, S, Sun, DP, Guo, RJ, Han, XC, Xu, WZ, Hua, H, Li, XQ, Li, CG, Han, R, Sun, BH, Zhu, LH, Bucher, TD, Kheswa, BV, Khumalo, N, Lawrie, EA, Lawrie, JJ, Malatji, KL, Msebi, L, Ndayishimye, J, Sharpey-Schafer, JF, Shirinda, O, Wiedeking, M, Dinoko, T & Ntshangase, SS 2025, 'First observation of pseudospin-chiral triplet bands with pure proton configuration', Physical Review C, vol. 112, no. 3, 034330. https://doi.org/10.1103/v667-vy2p

TY - JOUR

T1 - First observation of pseudospin-chiral triplet bands with pure proton configuration

AU - Zeng, W. B.

AU - Liu, C.

AU - Wang, S. Y.

AU - Qi, B.

AU - Bark, R. A.

AU - Jia, H.

AU - Meng, J.

AU - Zhang, S. Q.

AU - Wyngaardt, S. M.

AU - Chen, Q. B.

AU - Li, Z. Q.

AU - Wang, S.

AU - Sun, D. P.

AU - Guo, R. J.

AU - Han, X. C.

AU - Xu, W. Z.

AU - Hua, H.

AU - Li, X. Q.

AU - Li, C. G.

AU - Han, R.

AU - Sun, B. H.

AU - Zhu, L. H.

AU - Bucher, T. D.

AU - Kheswa, B. V.

AU - Khumalo, N.

AU - Lawrie, E. A.

AU - Lawrie, J. J.

AU - Malatji, K. L.

AU - Msebi, L.

AU - Ndayishimye, J.

AU - Sharpey-Schafer, J. F.

AU - Shirinda, O.

AU - Wiedeking, M.

AU - Dinoko, T.

AU - Ntshangase, S. S.

PY - 2025/9/23

Y1 - 2025/9/23

N2 - High-spin states of 81Br were populated using the 82Se(α, p4n) reaction. One positive-parity band and four negative-parity bands were observed. Based on the experimental characteristics of these bands, a pair of nearly degenerate three-quasiparticle bands with negative parity are interpreted as chiral doublet bands based on the π( f5/2, p3/2 )-5πg2 9/2 configuration. The third three-quasiparticle band is interpreted as a pseudospin partner band, thereby forming pseudospin-chiral triplet bands in 81Br. The interpretation was supported by the relativistic density functional theory and the multiparticle plus rotor model calculations. The present work suggests a new chiral configuration in the nuclear system and reports the first observation of pseudospin-chiral triplet bands with a pure proton configuration.

AB - High-spin states of 81Br were populated using the 82Se(α, p4n) reaction. One positive-parity band and four negative-parity bands were observed. Based on the experimental characteristics of these bands, a pair of nearly degenerate three-quasiparticle bands with negative parity are interpreted as chiral doublet bands based on the π( f5/2, p3/2 )-5πg2 9/2 configuration. The third three-quasiparticle band is interpreted as a pseudospin partner band, thereby forming pseudospin-chiral triplet bands in 81Br. The interpretation was supported by the relativistic density functional theory and the multiparticle plus rotor model calculations. The present work suggests a new chiral configuration in the nuclear system and reports the first observation of pseudospin-chiral triplet bands with a pure proton configuration.

UR - https://www.scopus.com/pages/publications/105027435607

U2 - 10.1103/v667-vy2p

DO - 10.1103/v667-vy2p

M3 - Review article

AN - SCOPUS:105027435607

SN - 2469-9985

VL - 112

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 034330

ER -

First observation of pseudospin-chiral triplet bands with pure proton configuration

Abstract

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