Reorientation-effect measurement of the (21+ ? Ê 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al.

J. N. Orce; E. J.Martín Montes; K. J. Abrahams; C. Ngwetsheni; B. A. Brown; M. Kumar Raju; C. V. Mehl; M. J. Mokgolobotho; E. H. Akakpo; D. L. Mavela; P. Adsley; R. A. Bark; N. Bernier; T. D. Bucher; N. R. Erasmus; T. S. Dinoko; P. M. Jones; N. Y. Kheswa; N. A. Khumalo; E. A. Lawrie; J. J. Lawrie; B. L. Lesch; S. N.T. Majola; S. S. Ntshangase; P. Papka; V. Pesudo; B. Rebeiro; O. Shirinda; M. Wiedeking; W. Yahia-Cherif

doi:10.1103/PhysRevC.104.L061305

Reorientation-effect measurement of the (21+ ? Ê 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al.

J. N. Orce, E. J.Martín Montes, K. J. Abrahams, C. Ngwetsheni, B. A. Brown, M. Kumar Raju, C. V. Mehl, M. J. Mokgolobotho, E. H. Akakpo, D. L. Mavela, P. Adsley, R. A. Bark, N. Bernier, T. D. Bucher, N. R. Erasmus, T. S. Dinoko, P. M. Jones, N. Y. Kheswa, N. A. Khumalo, E. A. LawrieJ. J. Lawrie, B. L. Lesch, S. N.T. Majola, S. S. Ntshangase, P. Papka, V. Pesudo, B. Rebeiro, O. Shirinda, M. Wiedeking, W. Yahia-Cherif

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

2 Citations (Scopus)

Abstract

The spectroscopic quadrupole moment of the first excited 21+ state, QS(21+), at 1.970 MeV in Ar36 was determined at energies well below the Coulomb barrier - where nuclear interference effects are negligible - using the Pt194(Ar36,Ar36)Pt194 Coulomb-excitation reaction at 134.2 MeV. Particle-gamma coincidence data were collected using the AFRODITE array - composed of eight high-purity germanium clover detectors - and an upstream double-sided silicon detector at iThemba LABS. A large diagonal matrix element of (21+E221+)=0.163(42) eb was determined, which yields a more accurate value of QS(21+)=+0.12(3) eb as compared with previous work, QS(21+)=+0.11(6) eb, in agreement with modern beyond mean-field and large-scale shell-model calculations. This value is consistent with the ratio of electric quadrupole moments found for other A=4n self-conjugate nuclei extracted from the reorientation effect and the rotor model, which are surprisingly equivalent to those observed in good rotors in the mass A160-180 region.

Original language	English
Article number	L061305
Journal	Physical Review C
Volume	104
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.104.L061305
Publication status	Published - Dec 2021
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.104.L061305

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Orce, J. N., Montes, E. J. M., Abrahams, K. J., Ngwetsheni, C., Brown, B. A., Raju, M. K., Mehl, C. V., Mokgolobotho, M. J., Akakpo, E. H., Mavela, D. L., Adsley, P., Bark, R. A., Bernier, N., Bucher, T. D., Erasmus, N. R., Dinoko, T. S., Jones, P. M., Kheswa, N. Y., Khumalo, N. A., ... Yahia-Cherif, W. (2021). Reorientation-effect measurement of the (21+ ? Ê 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al. Physical Review C, 104(6), Article L061305. https://doi.org/10.1103/PhysRevC.104.L061305

@article{83068f0ea4d84263b6e6a1b262dcb7f1,

title = "Reorientation-effect measurement of the (21+ ? {\^E} 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al.",

abstract = "The spectroscopic quadrupole moment of the first excited 21+ state, QS(21+), at 1.970 MeV in Ar36 was determined at energies well below the Coulomb barrier - where nuclear interference effects are negligible - using the Pt194(Ar36,Ar36)Pt194 Coulomb-excitation reaction at 134.2 MeV. Particle-gamma coincidence data were collected using the AFRODITE array - composed of eight high-purity germanium clover detectors - and an upstream double-sided silicon detector at iThemba LABS. A large diagonal matrix element of (21+E221+)=0.163(42) eb was determined, which yields a more accurate value of QS(21+)=+0.12(3) eb as compared with previous work, QS(21+)=+0.11(6) eb, in agreement with modern beyond mean-field and large-scale shell-model calculations. This value is consistent with the ratio of electric quadrupole moments found for other A=4n self-conjugate nuclei extracted from the reorientation effect and the rotor model, which are surprisingly equivalent to those observed in good rotors in the mass A160-180 region.",

author = "Orce, {J. N.} and Montes, {E. J.Mart{\'i}n} and Abrahams, {K. J.} and C. Ngwetsheni and Brown, {B. A.} and Raju, {M. Kumar} and Mehl, {C. V.} and Mokgolobotho, {M. J.} and Akakpo, {E. H.} and Mavela, {D. L.} and P. Adsley and Bark, {R. A.} and N. Bernier and Bucher, {T. D.} and Erasmus, {N. R.} and Dinoko, {T. S.} and Jones, {P. M.} and Kheswa, {N. Y.} and Khumalo, {N. A.} and Lawrie, {E. A.} and Lawrie, {J. J.} and Lesch, {B. L.} and Majola, {S. N.T.} and Ntshangase, {S. S.} and P. Papka and V. Pesudo and B. Rebeiro and O. Shirinda and M. Wiedeking and W. Yahia-Cherif",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

month = dec,

doi = "10.1103/PhysRevC.104.L061305",

language = "English",

volume = "104",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

Orce, JN, Montes, EJM, Abrahams, KJ, Ngwetsheni, C, Brown, BA, Raju, MK, Mehl, CV, Mokgolobotho, MJ, Akakpo, EH, Mavela, DL, Adsley, P, Bark, RA, Bernier, N, Bucher, TD, Erasmus, NR, Dinoko, TS, Jones, PM, Kheswa, NY, Khumalo, NA, Lawrie, EA, Lawrie, JJ, Lesch, BL, Majola, SNT, Ntshangase, SS, Papka, P, Pesudo, V, Rebeiro, B, Shirinda, O, Wiedeking, M & Yahia-Cherif, W 2021, 'Reorientation-effect measurement of the (21+ ? Ê 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al.', Physical Review C, vol. 104, no. 6, L061305. https://doi.org/10.1103/PhysRevC.104.L061305

TY - JOUR

T1 - Reorientation-effect measurement of the (21+ ? Ê 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al.

AU - Orce, J. N.

AU - Montes, E. J.Martín

AU - Abrahams, K. J.

AU - Ngwetsheni, C.

AU - Brown, B. A.

AU - Raju, M. Kumar

AU - Mehl, C. V.

AU - Mokgolobotho, M. J.

AU - Akakpo, E. H.

AU - Mavela, D. L.

AU - Adsley, P.

AU - Bark, R. A.

AU - Bernier, N.

AU - Bucher, T. D.

AU - Erasmus, N. R.

AU - Dinoko, T. S.

AU - Jones, P. M.

AU - Kheswa, N. Y.

AU - Khumalo, N. A.

AU - Lawrie, E. A.

AU - Lawrie, J. J.

AU - Lesch, B. L.

AU - Majola, S. N.T.

AU - Ntshangase, S. S.

AU - Papka, P.

AU - Pesudo, V.

AU - Rebeiro, B.

AU - Shirinda, O.

AU - Wiedeking, M.

AU - Yahia-Cherif, W.

PY - 2021/12

Y1 - 2021/12

N2 - The spectroscopic quadrupole moment of the first excited 21+ state, QS(21+), at 1.970 MeV in Ar36 was determined at energies well below the Coulomb barrier - where nuclear interference effects are negligible - using the Pt194(Ar36,Ar36)Pt194 Coulomb-excitation reaction at 134.2 MeV. Particle-gamma coincidence data were collected using the AFRODITE array - composed of eight high-purity germanium clover detectors - and an upstream double-sided silicon detector at iThemba LABS. A large diagonal matrix element of (21+E221+)=0.163(42) eb was determined, which yields a more accurate value of QS(21+)=+0.12(3) eb as compared with previous work, QS(21+)=+0.11(6) eb, in agreement with modern beyond mean-field and large-scale shell-model calculations. This value is consistent with the ratio of electric quadrupole moments found for other A=4n self-conjugate nuclei extracted from the reorientation effect and the rotor model, which are surprisingly equivalent to those observed in good rotors in the mass A160-180 region.

AB - The spectroscopic quadrupole moment of the first excited 21+ state, QS(21+), at 1.970 MeV in Ar36 was determined at energies well below the Coulomb barrier - where nuclear interference effects are negligible - using the Pt194(Ar36,Ar36)Pt194 Coulomb-excitation reaction at 134.2 MeV. Particle-gamma coincidence data were collected using the AFRODITE array - composed of eight high-purity germanium clover detectors - and an upstream double-sided silicon detector at iThemba LABS. A large diagonal matrix element of (21+E221+)=0.163(42) eb was determined, which yields a more accurate value of QS(21+)=+0.12(3) eb as compared with previous work, QS(21+)=+0.11(6) eb, in agreement with modern beyond mean-field and large-scale shell-model calculations. This value is consistent with the ratio of electric quadrupole moments found for other A=4n self-conjugate nuclei extracted from the reorientation effect and the rotor model, which are surprisingly equivalent to those observed in good rotors in the mass A160-180 region.

UR - http://www.scopus.com/inward/record.url?scp=85122493324&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.104.L061305

DO - 10.1103/PhysRevC.104.L061305

M3 - Article

AN - SCOPUS:85122493324

SN - 2469-9985

VL - 104

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - L061305

ER -

Reorientation-effect measurement of the (21+ ? Ê 2? 21+) matrix element in Ar 36 REORIENTATION-EFFECT MEASUREMENT OF THE ... J. N. ORCE et al.

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