Resolution of chiral conundrum in ag 106: Doppler-shift lifetime investigation

E. O. Lieder; R. M. Lieder; R. A. Bark; Q. B. Chen; S. Q. Zhang; J. Meng; E. A. Lawrie; J. J. Lawrie; S. P. Bvumbi; N. Y. Kheswa; S. S. Ntshangase; T. E. Madiba; P. L. Masiteng; S. M. Mullins; S. Murray; P. Papka; D. G. Roux; O. Shirinda; Z. H. Zhang; P. W. Zhao; Z. P. Li; J. Peng; B. Qi; S. Y. Wang; Z. G. Xiao; C. Xu

doi:10.1103/PhysRevLett.112.202502

Resolution of chiral conundrum in ag 106: Doppler-shift lifetime investigation

E. O. Lieder
, R. M. Lieder^*
, R. A. Bark
, Q. B. Chen
, S. Q. Zhang
, J. Meng
, E. A. Lawrie
, J. J. Lawrie
, S. P. Bvumbi
, N. Y. Kheswa
, S. S. Ntshangase
, T. E. Madiba
, P. L. Masiteng
, S. M. Mullins
, S. Murray
, P. Papka
, D. G. Roux
, O. Shirinda
, Z. H. Zhang
, P. W. Zhao

Z. P. Li, J. Peng, B. Qi, S. Y. Wang, Z. G. Xiao, C. Xu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

The nature of the chiral candidate bands in Ag106, one of only two known examples of candidates which actually cross, is investigated experimentally and theoretically. Lifetimes have been determined for these bands in Ag106 using the Doppler-shift attenuation method with the γ-detector array AFRODITE. The level scheme of Ag106 has been extended, and three negative-parity bands have been observed to high spins. Configurations were assigned to the negative-parity bands based on a quasiparticle alignment analysis and on configuration-fixed constrained relativistic mean field calculations. The excitation energies, B(M1) and B(E2) values, as well as B(M1)/B(E2) ratios have been compared with results of particle-rotor model calculations. From the investigations, it is concluded that the three close-lying negative-parity bands are a two-quasiparticle high-K band and a pair of four-quasiparticle bands. The proposal that the two lowest-lying bands are chiral partners has not been confirmed.

Original language	English
Article number	202502
Journal	Physical Review Letters
Volume	112
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.112.202502
State	Published - 20 May 2014
Externally published	Yes

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Lieder, E. O., Lieder, R. M., Bark, R. A., Chen, Q. B., Zhang, S. Q., Meng, J., Lawrie, E. A., Lawrie, J. J., Bvumbi, S. P., Kheswa, N. Y., Ntshangase, S. S., Madiba, T. E., Masiteng, P. L., Mullins, S. M., Murray, S., Papka, P., Roux, D. G., Shirinda, O., Zhang, Z. H., ... Xu, C. (2014). Resolution of chiral conundrum in ag 106: Doppler-shift lifetime investigation. Physical Review Letters, 112(20), Article 202502. https://doi.org/10.1103/PhysRevLett.112.202502

@article{a66b1b607e8743d48742927af9df41f7,

title = "Resolution of chiral conundrum in ag 106: Doppler-shift lifetime investigation",

abstract = "The nature of the chiral candidate bands in Ag106, one of only two known examples of candidates which actually cross, is investigated experimentally and theoretically. Lifetimes have been determined for these bands in Ag106 using the Doppler-shift attenuation method with the γ-detector array AFRODITE. The level scheme of Ag106 has been extended, and three negative-parity bands have been observed to high spins. Configurations were assigned to the negative-parity bands based on a quasiparticle alignment analysis and on configuration-fixed constrained relativistic mean field calculations. The excitation energies, B(M1) and B(E2) values, as well as B(M1)/B(E2) ratios have been compared with results of particle-rotor model calculations. From the investigations, it is concluded that the three close-lying negative-parity bands are a two-quasiparticle high-K band and a pair of four-quasiparticle bands. The proposal that the two lowest-lying bands are chiral partners has not been confirmed.",

author = "Lieder, \{E. O.\} and Lieder, \{R. M.\} and Bark, \{R. A.\} and Chen, \{Q. B.\} and Zhang, \{S. Q.\} and J. Meng and Lawrie, \{E. A.\} and Lawrie, \{J. J.\} and Bvumbi, \{S. P.\} and Kheswa, \{N. Y.\} and Ntshangase, \{S. S.\} and Madiba, \{T. E.\} and Masiteng, \{P. L.\} and Mullins, \{S. M.\} and S. Murray and P. Papka and Roux, \{D. G.\} and O. Shirinda and Zhang, \{Z. H.\} and Zhao, \{P. W.\} and Li, \{Z. P.\} and J. Peng and B. Qi and Wang, \{S. Y.\} and Xiao, \{Z. G.\} and C. Xu",

year = "2014",

month = may,

day = "20",

doi = "10.1103/PhysRevLett.112.202502",

language = "英语",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "20",

}

Lieder, EO, Lieder, RM, Bark, RA, Chen, QB, Zhang, SQ, Meng, J, Lawrie, EA, Lawrie, JJ, Bvumbi, SP, Kheswa, NY, Ntshangase, SS, Madiba, TE, Masiteng, PL, Mullins, SM, Murray, S, Papka, P, Roux, DG, Shirinda, O, Zhang, ZH, Zhao, PW, Li, ZP, Peng, J, Qi, B, Wang, SY, Xiao, ZG & Xu, C 2014, 'Resolution of chiral conundrum in ag 106: Doppler-shift lifetime investigation', Physical Review Letters, vol. 112, no. 20, 202502. https://doi.org/10.1103/PhysRevLett.112.202502

TY - JOUR

T1 - Resolution of chiral conundrum in ag 106

T2 - Doppler-shift lifetime investigation

AU - Lieder, E. O.

AU - Lieder, R. M.

AU - Bark, R. A.

AU - Chen, Q. B.

AU - Zhang, S. Q.

AU - Meng, J.

AU - Lawrie, E. A.

AU - Lawrie, J. J.

AU - Bvumbi, S. P.

AU - Kheswa, N. Y.

AU - Ntshangase, S. S.

AU - Madiba, T. E.

AU - Masiteng, P. L.

AU - Mullins, S. M.

AU - Murray, S.

AU - Papka, P.

AU - Roux, D. G.

AU - Shirinda, O.

AU - Zhang, Z. H.

AU - Zhao, P. W.

AU - Li, Z. P.

AU - Peng, J.

AU - Qi, B.

AU - Wang, S. Y.

AU - Xiao, Z. G.

AU - Xu, C.

PY - 2014/5/20

Y1 - 2014/5/20

N2 - The nature of the chiral candidate bands in Ag106, one of only two known examples of candidates which actually cross, is investigated experimentally and theoretically. Lifetimes have been determined for these bands in Ag106 using the Doppler-shift attenuation method with the γ-detector array AFRODITE. The level scheme of Ag106 has been extended, and three negative-parity bands have been observed to high spins. Configurations were assigned to the negative-parity bands based on a quasiparticle alignment analysis and on configuration-fixed constrained relativistic mean field calculations. The excitation energies, B(M1) and B(E2) values, as well as B(M1)/B(E2) ratios have been compared with results of particle-rotor model calculations. From the investigations, it is concluded that the three close-lying negative-parity bands are a two-quasiparticle high-K band and a pair of four-quasiparticle bands. The proposal that the two lowest-lying bands are chiral partners has not been confirmed.

AB - The nature of the chiral candidate bands in Ag106, one of only two known examples of candidates which actually cross, is investigated experimentally and theoretically. Lifetimes have been determined for these bands in Ag106 using the Doppler-shift attenuation method with the γ-detector array AFRODITE. The level scheme of Ag106 has been extended, and three negative-parity bands have been observed to high spins. Configurations were assigned to the negative-parity bands based on a quasiparticle alignment analysis and on configuration-fixed constrained relativistic mean field calculations. The excitation energies, B(M1) and B(E2) values, as well as B(M1)/B(E2) ratios have been compared with results of particle-rotor model calculations. From the investigations, it is concluded that the three close-lying negative-parity bands are a two-quasiparticle high-K band and a pair of four-quasiparticle bands. The proposal that the two lowest-lying bands are chiral partners has not been confirmed.

UR - https://www.scopus.com/pages/publications/84901440843

U2 - 10.1103/PhysRevLett.112.202502

DO - 10.1103/PhysRevLett.112.202502

M3 - 文章

AN - SCOPUS:84901440843

SN - 0031-9007

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

M1 - 202502

ER -

Resolution of chiral conundrum in ag 106: Doppler-shift lifetime investigation

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