Mixed-Symmetry Interacting-Boson-Model States in the Nuclei <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ba</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>140</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ce</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>142</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Nd</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>144</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> with <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>N</mi><mo>=</mo><mn>84</mn><mn></mn></math>

W. D. Hamilton; A. Irbäck; J. P. Elliott

doi:10.1103/PhysRevLett.53.2469

Mixed-Symmetry Interacting-Boson-Model States in the Nuclei ${}^{140}{Ba}$ , ${}^{142}{Ce}$ , and ${}^{144}{Nd}$ with $N = 84$

W. D. Hamilton, A. Irbäck, and J. P. Elliott

Phys. Rev. Lett. 53, 2469 – Published 24 December 1984

Abstract

The $γ$ decay from the $2_{3}^{+}$ state at about 2-MeV excitation in the nuclei ${}^{140}{Ba}$ , ${}^{142}{Ce}$ , and ${}^{144}{Nd}$ , with 84 neutrons, is shown to be consistent with its identification as the lowest state of mixed symmetry in the U(5) limit of the neutron-proton version of the interacting-boson model.