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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, Volume 104, No. 6, Article L061305, Year 2021

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.

Orce, José Nicolás
1. South Africa, Bellville University of the Western Cape
2. South Africa, Stellenbosch National Institute for Theoretical and Computational Sciences Nithecs
Montes, E. J.Martín
1. South Africa, Bellville University of the Western Cape
Abrahams, K. J.
1. South Africa, Bellville University of the Western Cape
Ngwetsheni, Cebo
1. South Africa, Bellville University of the Western Cape
Brown, B. Alex
1. United States, East Lansing Michigan State University
Kumar Raju, M.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Pretoria National Research Foundation
3. South Africa, Pretoria National Metrology Institute of South Africa
Mehl, C. V.
1. South Africa, Bellville University of the Western Cape
Mokgolobotho, M. J.
1. South Africa, Bellville University of the Western Cape
Akakpo, E. H.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Ulundi University of Zululand
Mavela, D. L.
1. South Africa, Bellville University of the Western Cape
Adsley, Philip
1. South Africa, Pretoria National Research Foundation
2. South Africa, Stellenbosch Stellenbosch University
Bark, Robert A.
1. South Africa, Pretoria National Research Foundation
Bernier, N.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Ulundi University of Zululand
Bucher, T. D.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Ulundi University of Zululand
Erasmus, N. R.
1. South Africa, Bellville University of the Western Cape
Dinoko, T. S.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Pretoria National Research Foundation
3. South Africa, Kimberley Sol Plaatje University
Jones, Pete M.
1. South Africa, Pretoria National Research Foundation
Kheswa, Ntombizonke Y.
1. South Africa, Pretoria National Research Foundation
Khumalo, N. A.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Pretoria National Research Foundation
Lawrie, Elena A.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Pretoria National Research Foundation
Lawrie, J. J.
1. South Africa, Bellville University of the Western Cape
2. South Africa, Pretoria National Research Foundation
Lesch, Brenden L.
1. South Africa, Bellville University of the Western Cape
Majola, Siyabonga N.T.
1. South Africa, Ulundi University of Zululand
Ntshangase, Sifiso S.
1. South Africa, Ulundi University of Zululand
Papka, Paul
1. South Africa, Pretoria National Research Foundation
2. South Africa, Stellenbosch Stellenbosch University
Pesudo, Vicente
1. South Africa, Bellville University of the Western Cape
2. South Africa, Pretoria National Research Foundation
Rebeiro, B. M.
1. South Africa, Bellville University of the Western Cape
Shirinda, Obed
1. South Africa, Pretoria National Research Foundation
2. China, Lanzhou Institute of Modern Physics Chinese Academy of Sciences
Wiedeking, Mathis
1. South Africa, Pretoria National Research Foundation
2. South Africa, Johannesburg University of the Witwatersrand
Yahia-Cherif, W.
1. Algeria, Algiers Université Des Sciences et de la Technologie Houari Boumediene

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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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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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