First Measurement of the g Factor in the Chiral Band: The Case of the 128Cs Isomeric State

被引：28

作者：

Grodner, E. ^{[1
,2
]}

Srebrny, J. ^{[3
]}

Droste, Ch. ^{[2
]}

Prochniak, L. ^{[3
]}

Rohozinski, S. G. ^{[2
]}

Kowalczyk, M. ^{[3
]}

Ionescu-Bujor, M. ^{[4
]}

Ur, C. A. ^{[5
]}

Starosta, K. ^{[6
]}

Ahn, T. ^{[7
]}

Kisielinski, M. ^{[3
]}

Marchlewski, T. ^{[3
]}

Aydin, S. ^{[8
,11
]}

Recchia, F. ^{[9
,10
]}

Georgiev, G. ^{[12
]}

Lozeva, R. ^{[12
]}

Fiori, E. ^{[12
]}

Zielinska, M. ^{[3
]}

Chen, Q. B. ^{[13
]}

Zhang, S. Q. ^{[13
]}

Yu, L. F. ^{[13
]}

Zhao, P. W. ^{[13
]}

Meng, J. ^{[13
,14
]}

机构：

[1] Natl Ctr Nucl Res, PL-05540 Otwock, Poland

[2] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland

[3] Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland

[4] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest 077125, Romania

[5] IFIN HH, Extreme Light Infrastruct, Bucharest 077125, Romania

[6] Simon Fraser Univ, Vancouver, BC V5A 1S6, Canada

[7] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[8] Ist Nazl Fis Nucl, I-35020 Legnaro 2, Italy

[9] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[10] INFN, Sez Padova, I-35131 Padua, Italy

[11] Aksaray Univ, Dept Phys, TR-68100 Aksaray, Turkey

[12] Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS IN2P3, F-91405 Orsay, France

[13] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[14] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 02期

基金：

中国博士后科学基金; 美国国家科学基金会; 中国国家自然科学基金;

关键词：

TRIAXIAL NUCLEI;

D O I：

10.1103/PhysRevLett.120.022502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The g factor of the 56 ns half-life isomeric state in Cs-128 has been measured using the time-differential perturbed angular distribution method. This state is the bandhead of the positive-parity chiral rotational band, which emerges when an unpaired proton, an unpaired neutron hole, and an even-even core are coupled such that their angular momentum vectors are aplanar (chiral configuration). g-factor measurements can give important information on the relative orientation of the three angular momentum vectors. The measured g factor g = +0.59(1) shows that there is an important contribution of the core rotation in the total angular momentum of the isomeric state. Moreover, a quantitative theoretical analysis supports the conclusion that the three angular momentum vectors lie almost in one plane, which suggests that the chiral configuration in Cs-128 demonstrated in previous works by characteristic patterns of electromagnetic transitions appears only above some value of the total nuclear spin.

引用

页数：5

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