Article

Octupole collectivity in the ground band of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>148</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

R. W. IbbotsonDepartment of Physics, University of York, York YO1 5DD, United KingdomCarmen WhiteDepartment of Physics, University of York, York YO1 5DD, United KingdomT. CzosnykaDepartment of Physics, University of York, York YO1 5DD, United KingdomP. A. ButlerDepartment of Physics, University of York, York YO1 5DD, United KingdomN. ClarksonDepartment of Physics, University of York, York YO1 5DD, United KingdomD. ClineDepartment of Physics, University of York, York YO1 5DD, United KingdomR.A. CunninghamDepartment of Physics, University of York, York YO1 5DD, United KingdomM. DevlinDepartment of Physics, University of York, York YO1 5DD, United KingdomK. G. HelmerDepartment of Physics, University of York, York YO1 5DD, United KingdomT. H. HoareDepartment of Physics, University of York, York YO1 5DD, United KingdomJ. R. HughesDepartment of Physics, University of York, York YO1 5DD, United KingdomG. D. JonesDepartment of Physics, University of York, York YO1 5DD, United KingdomA.E. KavkaDepartment of Physics, University of York, York YO1 5DD, United KingdomB. KotlińskiDepartment of Physics, University of York, York YO1 5DD, United KingdomR J PoynterDepartment of Physics, University of York, York YO1 5DD, United KingdomP. H. ReganDepartment of Physics, University of York, York YO1 5DD, United KingdomE.G. VogtDepartment of Physics, University of York, York YO1 5DD, United KingdomR. WadsworthDepartment of Physics, University of York, York YO1 5DD, United KingdomD. L. WatsonDepartment of Physics, University of York, York YO1 5DD, United KingdomC. Y. WuDepartment of Physics, University of York, York YO1 5DD, United Kingdom

1993lv

ABI

Abstract

E3 matrix elements have been determined for transitions between states up to ${\mathit{I}}^{\mathrm{\ensuremath{\pi}}}$=${13}^{\mathrm{\ensuremath{-}}}$ in $^{148}\mathrm{Nd}$, providing direct evidence for strong octupole collectivity in a rotational band. These values, as well as the corresponding E1 and E2 matrix elements, were obtained from Coulomb excitation data using $^{58}\mathrm{Ni}$ and $^{92}\mathrm{Mo}$ ions, projectile excitation using a $^{208}\mathrm{Pb}$ target, and from recoil distance lifetime measurements. The results are consistent with collective model predictions for $^{148}\mathrm{Nd}$ assuming intrinsic quadrupole and octupole moments of ${\mathit{Q}}_{20}$\ensuremath{\approxeq}400 e ${\mathrm{fm}}^{2}$ and ${\mathit{Q}}_{30}$\ensuremath{\approxeq}1500 e ${\mathrm{fm}}^{3}$. The E3 strength coupling the negative-parity states to the \ensuremath{\beta} band is found to be appreciable.

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Identifiers

DOI: 10.1103/physrevlett.71.1990

Citations and references

Cited by 30 references

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