Phys. Rev. C 78, 034308 (2008) [6 pages]Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotonesReceived 12 December 2007; revised 25 March 2008; published 15 September 2008 Isomers have been populated in 246Cm and 252No with quantum numbers Kπ=8-, which decay through Kπ=2- rotational bands built on octupole vibrational states. For N=150 isotones with (even) atomic number Z=94–102, the Kπ=8- and 2- states have remarkably stable energies, indicating neutron excitations. An exception is a singular minimum in the 2- energy at Z=98, due to the additional role of proton configurations. The nearly constant energies, in isotones spanning an 18% increase in Coulomb energy near the Coulomb limit, provide a test for theory. The two-quasiparticle Kπ=8- energies are described with single-particle energies given by the Woods-Saxon potential and the Kπ=2- vibrational energies by quasiparticle random-phase approximation calculations. Ramifications for self-consistent mean-field theory are discussed. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.78.034308
DOI:
10.1103/PhysRevC.78.034308
PACS:
23.20.Lv, 21.10.Pc, 21.10.Tg, 27.90.+b
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