Reorientation-effect measurement of the ⟨21+∥(E)over-cap2∥21+⟩ matrix element in 36Ar

被引：2

作者：

Orce, J. N. ^{[1
,2
]}

Montes, E. J. Martin ^{[1
]}

Abrahams, K. J. ^{[1
]}

Ngwetsheni, C. ^{[1
]}

Brown, B. A. ^{[3
,4
]}

Raju, M. Kumar ^{[1
,5
,10
]}

Mehl, C., V ^{[1
]}

Mokgolobotho, M. J. ^{[1
]}

Akakpo, E. H. ^{[1
,6
]}

Mavela, D. L. ^{[1
]}

Adsley, P. ^{[5
,7
]}

Bark, R. A. ^{[5
]}

Bernier, N. ^{[1
,6
]}

Bucher, T. D. ^{[1
,6
]}

Erasmus, N. R. ^{[1
]}

Dinoko, T. S. ^{[1
,5
,11
]}

Jones, P. M. ^{[5
]}

Kheswa, N. Y. ^{[5
]}

Khumalo, N. A. ^{[1
,5
]}

Lawrie, E. A. ^{[1
,5
]}

Lawrie, J. J. ^{[1
,5
]}

Lesch, B. L. ^{[1
]}

Majola, S. N. T. ^{[6
]}

Ntshangase, S. S. ^{[6
]}

Papka, P. ^{[5
,7
]}

Pesudo, V ^{[1
,5
]}

Rebeiro, B. ^{[1
]}

Shirinda, O. ^{[5
,12
]}

Wiedeking, M. ^{[5
,8
]}

Yahia-Cherif, W. ^{[9
]}

机构：

[1] Univ Western Cape, Dept Phys & Astron, P-B X17, ZA-7535 Bellville, South Africa

[2] Natl Inst Theoret & Computat Sci NITheCS, ZA-7535 Stellenbosch, South Africa

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[4] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[5] Natl Res Fdn, iThemba Labs, POB 722, ZA-7129 Somerset West, South Africa

[6] Univ Zululand, Dept Phys & Engn, P-B X1001, ZA-3886 Kwa Dlangezwa, South Africa

[7] Univ Stellenbosch, Dept Phys, Private Bag X1, ZA-7602 Matieland, South Africa

[8] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[9] Univ Sci, Fac Phys, BP 32 El Alia, Bab Ezzouar 16111, Alger, Algeria

[10] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[11] Natl Metrol Inst South Africa, P-B X 34, ZA-0040 Pretoria, South Africa

[12] Plaatje Univ, Dept Phys & Earth Sci, P-B X5008, ZA-8301 Kimberley, South Africa

来源：

PHYSICAL REVIEW C | 2021年 / 104卷 / 06期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

1ST EXCITED-STATES; ELECTRIC QUADRUPOLE-MOMENTS; B(E2) VALUES; SHELL; S-32; EXCITATION; LIFETIMES; ENERGIES; NUCLEI; SI-28;

D O I：

10.1103/PhysRevC.104.L061305

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The spectroscopic quadrupole moment of the first excited 2(1)(+) state, Q(s)(2(1)(+)), at 1.970 MeV in Ar-36 was determined at energies well below the Coulomb barrier-where nuclear interference effects are negligible- using the Pt-194(Ar-36, Ar-36(+)) Pt-194(+) 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 < 2(1)(+)parallel to(E) over cap2 parallel to 2(1)(+)) = 0.163(42) eb was determined, which yields a more accurate value of Q(s)(2(1)(+)) = +0.12(3) eb as compared with previous work, Q(s)(2(1)(+)) = +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 A approximate to 160-180 region.

引用

页数：7

共 6 条

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