Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

被引：15

作者：

Hagen, T. W. ^{[1
]}

Goergen, A. ^{[1
]}

Korten, W. ^{[2
]}

Grente, L. ^{[2
]}

Salsac, M. -D. ^{[2
]}

Farget, F. ^{[3
]}

Ragnarsson, I. ^{[4
]}

Braunroth, T. ^{[5
]}

Bruyneel, B. ^{[2
]}

Celikovic, I. ^{[3
,6
]}

Clement, E. ^{[3
]}

de France, G. ^{[3
]}

Delaune, O. ^{[3
]}

Dewald, A. ^{[5
]}

Dijon, A. ^{[3
]}

Hackstein, M. ^{[5
]}

Jacquot, B. ^{[3
]}

Litzinger, J. ^{[5
]}

Ljungvall, J. ^{[7
]}

Louchart, C. ^{[2
]}

Michelagnoli, C. ^{[8
]}

Napoli, D. R. ^{[8
]}

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

Rother, W. ^{[5
]}

Sahin, E. ^{[1
,8
]}

Siem, S. ^{[1
]}

Sulignano, B. ^{[2
]}

Theisen, Ch. ^{[2
]}

Valiente-Dobon, J. J. ^{[8
]}

机构：

[1] Univ Oslo, Dept Phys, Oslo, Norway

[2] Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France

[3] CNRS IN2P3, CEA DRF, GANIL, Blvd Henri Becquerel, F-14076 Caen, France

[4] Lund Univ, LTH, Div Math Phys, Lund, Sweden

[5] Univ Cologne, Inst Kernphys, Cologne, Germany

[6] Univ Belgrade, Inst Nucl Sci Vinca, Belgrade, Serbia

[7] IN2P3, CSNSM, Orsay, France

[8] Ist Nazl Fis Nucl, Lab Nazl Legnaro, Legnaro, Italy

[9] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[10] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy

来源：

PHYSICAL REVIEW C | 2017年 / 95卷 / 03期

关键词：

ELECTRIC MONOPOLE TRANSITIONS; NEUTRON-RICH NUCLEI; ROTATIONAL BANDS; GROUND-STATE; DIFFERENTIAL PLUNGER; HIGH-SPIN; DEFORMATION; SPECTROMETER; TRIAXIALITY; FRAGMENTS;

D O I：

10.1103/PhysRevC.95.034302

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 excited states in Y-99, Y-101, Nb-101, Nb-103, and Nb-105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Accelerateur National d'Ions Lourds). The neutron-rich nuclei were produced in fission reactions between a U-238 beam and a Be-9 target. Prompt gamma rays were measured with the EXOGAM array and correlated with fission fragments that were identified in mass and atomic number with the VAMOS++ spectrometer. The measured lifetimes, together with branching ratios, provide B(M1) and B(E2) values for the strongly coupled rotational bands built on the [422] 5/2(+) ground state in the Y and Nb nuclei with neutron number N >= 60. The comparison of the experimental results with triaxial particle-rotor calculations provides information about the evolution of the nuclear shape in this mass region.

引用

页数：17

共 2 条

[1] Evolution of nuclear shapes in medium mass isotopes from a microscopic perspective
Robledo, L. M.
Rodriguez-Guzman, R. R.
Sarriguren, P.
PHYSICAL REVIEW C, 2008, 78 (03):
[2] Evolution of nuclear ground-state properties of neutron-deficient isotopes around Z=82 from precision mass measurements
Boehm, Ch.
Borgmann, Ch.
Audi, G.
Beck, D.
Blaum, K.
Breitenfeldt, M.
Cakirli, R. B.
Cocolios, T. E.
Eliseev, S.
George, S.
Herfurth, F.
Herlert, A.
Kowalska, M.
Kreim, S.
Lunney, D.
Manea, V.
Ramirez, E. Minaya
Naimi, S.
Neidherr, D.
Rosenbusch, M.
Schweikhard, L.
Stanja, J.
Wang, M.
Wolf, R. N.
Zuber, K.
PHYSICAL REVIEW C, 2014, 90 (04):

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