Deformation and Collectivity in Doubly Magic 208Pb

被引：0

作者：

Henderson, J. ^{[1
]}

Heery, J. ^{[1
]}

Rocchini, M. ^{[2
,3
]}

Siciliano, M. ^{[4
]}

Sensharma, N. ^{[4
]}

Ayangeakaa, A. D. ^{[5
,6
]}

Janssens, R. V. F. ^{[5
,6
]}

Kowalewski, T. M. ^{[5
,6
]}

Abhishek ^{[1
]}

Stevenson, P. D. ^{[1
]}

Yuksel, E. ^{[1
]}

Brown, B. A. ^{[7
,8
]}

Rodriguez, T. R. ^{[9
,10
,11
]}

Robledo, L. M. ^{[10
,11
,12
]}

Wu, C. Y. ^{[13
]}

Kisyov, S. ^{[13
,14
]}

Muller-Gatermann, C. ^{[4
]}

Bildstein, V. ^{[3
]}

Canete, L. ^{[1
]}

Campbell, C. M. ^{[14
]}

Carmichael, S. ^{[15
,16
]}

Carpenter, M. P. ^{[4
]}

Catford, W. N. ^{[1
]}

Copp, P. ^{[17
]}

Cousins, C. ^{[1
]}

Devlin, M. ^{[17
]}

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

Garrett, P. E. ^{[3
]}

Garg, U. ^{[15
,16
]}

Gaffney, L. P. ^{[18
]}

Hadynska-Klek, K. ^{[19
]}

Hartley, D. J. ^{[20
]}

Hicks, S. F. ^{[21
,22
,23
]}

Jayatissa, H. ^{[17
]}

Johnson, S. R. ^{[5
,6
]}

Kalaydjieva, D. ^{[24
]}

Kondev, F.

Lascar, D. ^{[25
]}

Lauritsen, T.

Lotay, G. ^{[1
]}

Marchini, N. ^{[2
]}

Matejska-Minda, M. ^{[26
]}

Nandi, S.

Nannini, A. ^{[2
]}

O'Shea, C. ^{[1
]}

Pascu, S. ^{[27
]}

Paxman, C. J. ^{[1
]}

Perkoff, A. ^{[28
]}

Peters, E. E.

Podolyak, Zs. ^{[1
]}

机构：

[1] Univ Surrey, Sch Math & Phys, Guildford GU2 7XH, Surrey, England

[2] Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, Firenze, Italy

[3] Univ Guelph, Dept Phys, Guelph, ON N1G2W1, Canada

[4] Argonne Natl Lab, Lemont, IL 60439 USA

[5] Univ North Carolina Chapel Hill, Chapel Hill, NC 27599 USA

[6] Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27708 USA

[7] Michigan State Univ, Facil Rare Isotope Beams, E Lansing, MI 48824 USA

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

[9] Univ Complutense Madrid, Dept Estruct Mat Fis Term & Elect, E-28040 Madrid, Spain

[10] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[11] Ctr Invest Avanzada Fis Fundamental CIAFF UAM, E-28049 Madrid, Spain

[12] Univ Politecn Madrid, Ctr Computat Simulat, Campus Montegancedo, E-28660 Bohadilla Del Monte, Madrid, Spain

[13] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[14] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA

[15] Univ Notre Dame, Dept Phys & Astron, 30 Notre Dame, Indiana, PA 46556 USA

[16] Univ Notre Dame, Joint Inst Nucl Astrophys, 30 Notre Dame, Indiana, PA 46556 USA

[17] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[18] Univ Liverpool, Dept Phys, Liverpool, Lancs, England

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

[20] US Naval Acad, Dept Phys, Annapolis, MD 21402 USA

[21] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA

[22] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[23] Univ Dallas, Dept Phys, Irving, TX 75062 USA

[24] Univ Paris Saclay, IRFU, CEA Saclay, Saclay, France

[25] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[26] Polish Acad Sci, Inst Nucl Phys, Krakow, Poland

[27] Natl Inst Phys & Nucl Engn, R-77125 Bucharest, Romania

[28] US Naval Acad, Annapolis, MD 21402 USA

[29] Natl Phys Lab, Teddington TW11 0LW, England

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

[31] Lab Nazl Legnaro, Legnaro, Italy

[32] TRIUMF, Vancouver, BC V6T 2A3, Canada

[33] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[34] UK Atom Energy Author, Culham Campus, Abingdon OX14 3DB, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2025年 / 134卷 / 06期

关键词：

QUADRUPOLE-MOMENT; COULOMB-EXCITATION; OCTUPOLE VIBRATION; STATES; DENSITY;

D O I：

10.1103/PhysRevLett.134.062502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Lead-208 is the heaviest known doubly magic nucleus and its structure is therefore of special interest. Despite this magicity, which acts to provide a strong restorative force toward sphericity, it is known to exhibit both strong octupole correlations and some of the strongest quadrupole collectivity observed in doubly magic systems. In this Letter, we employ state-of-the-art experimental equipment to conclusively demonstrate, through four Coulomb-excitation measurements, the presence of a large, negative, spectroscopic quadrupole moment for both the vibrational octupole 3-1 and quadrupole 2+1 state, indicative of a preference for prolate deformation of the states. The observed quadrupole moment is discussed in the context of the expected splitting of the 3- (R) 3- two-phonon states, due to the coupling of the quadrupole and octupole motion. These results are compared with theoretical values from three different methods, which are unable to reproduce both the sign and magnitude of this deformation. Thus, in spite of its well- studied nature, 208Pb remains a puzzle for our understanding of nuclear structure.

引用

页数：8

共 52 条

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