Abrupt shape transition at neutron number N=60: B(E2) values in 94,96,98Sr from fast γ-γ timing

被引：40

作者：

Regis, J. -M. ^{[1
]}

Jolie, J. ^{[1
]}

Saed-Samii, N. ^{[1
]}

Warr, N. ^{[1
]}

Pfeiffer, M. ^{[1
]}

Blanc, A. ^{[2
]}

Jentschel, M. ^{[2
]}

Koster, U. ^{[2
]}

Mutti, P. ^{[2
]}

Soldner, T. ^{[2
]}

Simpson, G. S. ^{[3
,11
]}

Drouet, F. ^{[3
]}

Vancraeyenest, A. ^{[3
]}

de France, G. ^{[4
]}

Clement, E. ^{[4
]}

Stezowski, O. ^{[5
]}

Ur, C. A. ^{[6
]}

Urban, W. ^{[7
]}

Regan, P. H. ^{[8
,17
]}

Podolyak, Zs. ^{[8
]}

Larijani, C. ^{[8
,18
]}

Townsley, C. ^{[8
]}

Carroll, R. ^{[8
]}

Wilson, E. ^{[8
]}

Fraile, L. M. ^{[9
]}

Mach, H. ^{[9
,19
]}

Paziy, V. ^{[9
]}

Olaizola, B. ^{[9
]}

Vedia, V. ^{[9
]}

Bruce, A. M. ^{[10
]}

Roberts, O. J. ^{[10
]}

Smith, J. F. ^{[11
]}

Scheck, M. ^{[11
]}

Kroell, T. ^{[12
]}

Hartig, A. -L. ^{[12
]}

Ignatov, A. ^{[12
]}

Ilieva, S. ^{[12
]}

Lalkovski, S. ^{[13
,19
]}

Korten, W. ^{[14
]}

Marginean, N. ^{[15
]}

Otsuka, T. ^{[16
,20
,21
,22
]}

Shimizu, N. ^{[16
]}

Togashi, T. ^{[16
]}

Tsunoda, Y. ^{[16
]}

机构：

[1] Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany

[2] Inst Laue Langevin, 71 Ave Martyrs, F-38042 Grenoble, France

[3] LPSC, 53 Ave Martyrs, F-38026 Grenoble, France

[4] CEA, CRF, CNRS, GANIL,IN2P3, F-14076 Caen 05, France

[5] IPN Lyon, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France

[6] Ist Nazl Fis Nucl, Via Marzolo 8, I-35131 Padua, Italy

[7] Univ Warsaw, Fac Phys, Ul Hoza 69, PL-00681 Warsaw, Poland

[8] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[9] Univ Complutense, FAMN, Grp Fis Nucl, E-28040 Madrid, Spain

[10] Univ Brighton, SCEM, Lewes Rd, Brighton BN2 4GJ, E Sussex, England

[11] Univ West Scotland, Sch Engn, Paisley PA1 2BE, Renfrew, Scotland

[12] Tech Univ Darmstadt, Inst Kernphys, Schlossgartenstr 9, D-64289 Darmstadt, Germany

[13] Univ Sofia, Fac Phys, Sofia 1164, Bulgaria

[14] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France

[15] Horia Hulubei NIPNE, Bucharest 77125, Romania

[16] Univ Tokyo, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[17] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[18] Natl Ctr Nucl Res, Ul Hoza 69, Warsaw, Poland

[19] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[20] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[21] Michigan State Univ, NSCL, E Lansing, MI 48824 USA

[22] Katholieke Univ Leuven, Inst Kern Stralingsfys, B-3001 Leuven, Belgium

来源：

PHYSICAL REVIEW C | 2017年 / 95卷 / 05期

关键词：

EXCITED-STATES; DEFORMATION;

D O I：

10.1103/PhysRevC.95.054319

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：

Lifetimes of low-lying yrast states in neutron-rich Sr-94,Sr-96,Sr-98 have been measured by Germanium-gated gamma-gamma fast timing with LaBr3(Ce) detectors using the EXILL& FATIMA spectrometer at the Institut Laue-Langevin. Sr fission products were generated using cold-neutron-induced fission of 235U and stopped almost instantaneously within the thick target. The experimental B(E2) values are compared with results of Monte Carlo shell-model calculations made without truncation on the occupation numbers of the orbits spanned by eight proton and eight neutron orbits and show good agreement. Similarly to the Zr isotopes, the abrupt shape transition in the Sr isotopes near neutron number N = 60 is identified as being caused by many-proton excitations to its g(9/2) orbit.

引用

页数：7

共 24 条

[1] Characterization of a ballistic supermirror neutron guide [J].

Abele, H. ;

Dubbers, D. ;

Haese, H. ;

Klein, M. ;

Knoepfler, A. ;

Kreuz, M. ;

Lauer, T. ;

Maerkisch, B. ;

Mund, D. ;

Nesvizhevsky, V. ;

Petoukhov, A. ;

Schmidt, C. ;

Schumann, M. ;

Soldner, T. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2006, 562 (01) :407-417

[2]

[Anonymous], 2004, lecture notes in physics

[3] The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb [J].

Bocchi, G. ;

Leoni, S. ;

Fornal, B. ;

Colo, G. ;

Bortignon, P. F. ;

Bottoni, S. ;

Bracco, A. ;

Michelagnoli, C. ;

Bazzacco, D. ;

Blanc, A. ;

de France, G. ;

Jentschel, M. ;

Koster, U. ;

Mutti, P. ;

Regis, J. -M. ;

Simpson, G. ;

Soldner, T. ;

Ur, C. A. ;

Urban, W. ;

Fraile, L. M. ;

Lozeva, R. ;

Belvito, B. ;

Benzoni, G. ;

Bruce, A. ;

Carroll, R. ;

Cieplicka-Orynczak, N. ;

Crespi, F. C. L. ;

Didierjean, F. ;

Jolie, J. ;

Korten, W. ;

Kroell, T. ;

Lalkovski, S. ;

Mach, H. ;

Marginean, N. ;

Melon, B. ;

Mengoni, D. ;

Million, B. ;

Nannini, A. ;

Napoli, D. ;

Olaizola, B. ;

Paziy, V. ;

Podolyak, Zs. ;

Regan, P. H. ;

Saed-Samii, N. ;

Szpak, B. ;

Vedia, V. .

PHYSICS LETTERS B, 2016, 760 :273-278

[4] Spectroscopic Quadrupole Moments in 96,98Sr: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes at N=60 [J].

Clement, E. ;

Zielinska, M. ;

Gorgen, A. ;

Korten, W. ;

Peru, S. ;

Libert, J. ;

Goutte, H. ;

Hilaire, S. ;

Bastin, B. ;

Bauer, C. ;

Blazhev, A. ;

Bree, N. ;

Bruyneel, B. ;

Butler, P. A. ;

Butterworth, J. ;

Delahaye, P. ;

Dijon, A. ;

Doherty, D. T. ;

Ekstrom, A. ;

Fitzpatrick, C. ;

Fransen, C. ;

Georgiev, G. ;

Gernhaeuser, R. ;

Hess, H. ;

Iwanicki, J. ;

Jenkins, D. G. ;

Larsen, A. C. ;

Ljungvall, J. ;

Lutter, R. ;

Marley, P. ;

Moschner, K. ;

Napiorkowski, P. J. ;

Pakarinen, J. ;

Petts, A. ;

Reiter, P. ;

Renstrom, T. ;

Seidlitz, M. ;

Siebeck, B. ;

Siem, S. ;

Sotty, C. ;

Srebrny, J. ;

Stefanescu, I. ;

Tveten, G. M. ;

Van de Walle, J. ;

Vermeulen, M. ;

Voulot, D. ;

Warr, N. ;

Wenander, F. ;

Wiens, A. ;

De Witte, H. .

PHYSICAL REVIEW LETTERS, 2016, 116 (02)

[5] Structure of even-even nuclei using a mapped collective Hamiltonian and the D1S Gogny interaction [J].

Delaroche, J. -P. ;

Girod, M. ;

Libert, J. ;

Goutte, H. ;

Hilaire, S. ;

Peru, S. ;

Pillet, N. ;

Bertsch, G. F. .

PHYSICAL REVIEW C, 2010, 81 (01)

[6]

England T.R., 1994, Tech. rep., LA-UR-94-3106

[7] TOWARDS A UNIFIED MICROSCOPIC DESCRIPTION OF NUCLEAR DEFORMATION [J].

FEDERMAN, P ;

PITTEL, S .

PHYSICS LETTERS B, 1977, 69 (04) :385-388

[8] Measurement of picosecond lifetimes in neutron-rich Xe isotopes [J].

Ilieva, S. ;

Kroell, Th. ;

Regis, J. -M. ;

Saed-Samii, N. ;

Blanc, A. ;

Bruce, A. M. ;

Fraile, L. M. ;

de France, G. ;

Hartig, A. -L. ;

Henrich, C. ;

Ignatov, A. ;

Jentschel, M. ;

Jolie, J. ;

Korten, W. ;

Koster, U. ;

Lalkovski, S. ;

Lozeva, R. ;

Mach, H. ;

Marginean, N. ;

Mutti, P. ;

Paziy, V. ;

Regan, P. H. ;

Simpson, G. S. ;

Soldner, T. ;

Thuerauf, M. ;

Ur, C. A. ;

Urban, W. ;

Warr, N. .

PHYSICAL REVIEW C, 2016, 94 (03)

[9] New isomer in 96Y marking the onset of deformation at N=57 [J].

Iskra, L. W. ;

Fornal, B. ;

Leoni, S. ;

Bocchi, G. ;

Petrovici, A. ;

Porzio, C. ;

Blanc, A. ;

De France, G. ;

Jentschel, M. ;

Koster, U. ;

Mutti, P. ;

Regis, J. -M. ;

Simpson, G. ;

Soldner, T. ;

Ur, C. A. ;

Urban, W. ;

Bazzacco, D. ;

Benzoni, G. ;

Bottoni, S. ;

Bruce, A. ;

Cieplicka-Orynczak, N. ;

Crespi, F. C. L. ;

Fraile, L. M. ;

Korten, W. ;

Kroll, T. ;

Lalkovski, S. ;

Marginean, N. ;

Michelagnoli, C. ;

Melon, B. ;

Mengoni, D. ;

Million, B. ;

Nannini, A. ;

Napoli, D. ;

Podolyak, Zs. ;

Regan, P. H. ;

Szpak, B. .

EPL, 2017, 117 (01)

[10] Test of the SO(6) selection rule in 196Pt using cold-neutron capture [J].

Jolie, J. ;

Regis, J. -M. ;

Wilmsen, D. ;

Saed-Samii, N. ;

Pfeiffer, M. ;

Warr, N. ;

Blanc, A. ;

Jentschel, M. ;

Koester, U. ;

Mutti, P. ;

Soldner, T. ;

Simpson, G. S. ;

De France, G. ;

Urban, W. ;

Drouet, F. ;

Vancraeyenest, A. ;

Bruce, A. M. ;

Roberts, O. J. ;

Fraile, L. M. ;

Paziy, V. ;

Ignatov, A. ;

Kroell, Th. ;

Ivanova, D. ;

Kisyov, S. ;

Lalkovski, S. ;

Podolyak, Zs. ;

Regan, P. H. ;

Wilson, E. ;

Korten, W. ;

Ur, C. A. ;

Lica, R. ;

Marginean, N. .

NUCLEAR PHYSICS A, 2015, 934 :1-7

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