New excited superdeformed bands in heavy Pb nuclei: Clue for an octupole softness near the N = 118 gap at large deformation

A Prévost,D Curien,G Schönwaßer,I Deloncle,N Nenoff,N Kintz,A Bauchet,N Buforn,E Mergel,N Redon,D Roßbach,A Astier,S Neumann,F.A Beck,R Duffait,H Hübel,M Meyer ,O Stézowski ,S Perriès ,M G Porquet ,A Görgen ,J.p Vivien ,A N Wilson ,Б Галл ,G Duchêne ,R Lucas ,D M Cullen

doi:10.1007/s100500170139

New excited superdeformed bands in heavy Pb nuclei: Clue for an octupole softness near the N = 118 gap at large deformation

A Prévost, D Curien + Show 25 more

https://doi.org/10.1007/s100500170139

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Journal: The European physical journal. A, Hadrons and nuclei	Publication Date: Feb 1, 2001
Citations: 15

Affiliation: Claude Bernard University Lyon 1, French National Centre for Scientific Research, University of Strasbourg, University of Bonn, University of Paris-Sud, Campus France, Institut Polytechnique de Paris, University of York, Direction des énergies, CEA Saclay, Atomic Energy and Alternative Energies Commission, University of Liverpool

#Superdeformed #Superdeformed Bands + Show 8 more

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Abstract

We report the identification of six new superdeformed (SD) bands in 197,198Pb observed with the EUROBALL IV spectrometer. The results are interpreted in the framework of cranked Hartree-Fock calculations with approximate projection on the particle number by means of the Lipkin-Nogami method. A mixing between quasi-particle excitations and an octupole vibration is suggested in the two SD isotopes. We have estimated the ordering of the neutron valence orbitals and confirm indirectly a N = 118 SD gap.

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