Suppressed electric quadrupole collectivity in 49Ti

被引：0

作者：

Gray, T. J. ^{[1
,2
]}

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

Benetti, C. ^{[3
]}

Wibisono, C. ^{[3
]}

Baby, L. ^{[3
]}

Gargano, A. ^{[4
]}

Miyagi, T. ^{[5
,6
,7
]}

Macchiavelli, A. O. ^{[1
]}

Stuchbery, A. E. ^{[8
]}

Wood, J. L. ^{[9
]}

Ajayi, S. ^{[3
]}

Aragon, J. ^{[3
]}

Asher, B. W. ^{[2
]}

Barber, P. ^{[3
]}

Bhattacharya, S. ^{[3
]}

Boisseau, R. ^{[3
]}

Christie, J. M. ^{[2
]}

Conley, A. L. ^{[3
]}

De Rosa, P. ^{[3
]}

Dowling, D. T. ^{[1
]}

Esparza, C. ^{[3
]}

Gibbons, J. ^{[3
]}

Hanselman, K. ^{[3
]}

Holt, J. D. ^{[10
,11
]}

Lopez-Caceres, S. ^{[12
]}

Saavedra, E. Lopez ^{[3
]}

McCann, G. W. ^{[3
]}

Morelock, A. ^{[3
]}

Kelly, B. ^{[3
]}

King, T. T. ^{[1
]}

Rasco, B. C. ^{[1
]}

Sitaraman, V. ^{[3
]}

Tabor, S. L. ^{[3
]}

Temanson, E. ^{[3
]}

Tripathi, V. ^{[3
]}

Wiedenhover, I. ^{[3
]}

Yadav, R. B. ^{[13
]}

机构：

[1] Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37966 USA

[3] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[4] Complesso Univ Monte S Angelo, Ist Nazl Fis Nucl, Via Cintia, I-80126 Naples, Italy

[5] Tech Univ Darmstadt, Dept Phys, Darmstadt, Germany

[6] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[7] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[8] Australian Natl Univ, Res Sch Phys, Dept Nucl Phys & Accelerator Applicat, Canberra, ACT 2601, Australia

[9] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

[10] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

[11] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[12] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[13] South Carolina State Univ, Dept Biol & Phys Sci, Orangeburg, SC 29117 USA

来源：

PHYSICS LETTERS B | 2024年 / 855卷

基金：

欧洲研究理事会; 加拿大自然科学与工程研究理事会; 澳大利亚研究理事会; 美国国家科学基金会;

关键词：

SHELL-MODEL DESCRIPTION; COULOMB-EXCITATION; GENERALIZED SENIORITY; CORE EXCITATIONS; EVEN TITANIUM; NPNN SCHEME; NUCLEI; SPECTROSCOPY;

D O I：

10.1016/j.physletb.2024.138856

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Single-step Coulomb excitation of Ti-46,Ti-48,Ti-49,Ti-50 is presented. A complete set of E2 matrix elements for the quintuplet of states in Ti-49, centred on the 2+ core excitation, was measured for the first time. A total of nine E2 matrix elements are reported, four of which were previously unknown. Ti-49(22)27 shows a 20% quenching in electric quadrupole transition strength as compared to its semi-magic Ti-50(22)28 neighbour. This 20% quenching, while empirically unprecedented, can be explained with a remarkably simple two-state mixing model, which is also consistent with other ground-state properties such as the magnetic dipole moment and electric quadrupole moment. A connection to nucleon transfer data and the quenching of single-particle strength is also demonstrated. The simplicity of the Ti-49-Ti-50 pair (i.e., approximate single-j 0f7/2 valence space and isolation of yrast states from non-yrast states) provides a unique opportunity to disentangle otherwise competing effects in the ground-state properties of atomic nuclei, the emergence of collectivity, and the role of proton-neutron interactions.

引用

页数：6

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