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Interrelation between the isoscalar octupole phonon and the proton-neutron mixed-symmetry quadrupole phonon in near-spherical nuclei

Abstract : The interrelation between the octupole phonon and the low-lying proton-neutron mixed-symmetry quadrupole phonon in near-spherical nuclei is investigated. The one-phonon states decay by collective E3 and E2 transitions to the ground state and by relatively strong E1 and M1 transitions to the isoscalar 2+ state. We apply the proton-neutron version of the Interacting Boson Model including quadrupole and octupole bosons (sdf-IBM-2). Two F-spin symmetric dynamical symmetry limits of the model, namely the vibrational and the \gamma-unstable ones, are considered. We derive analytical formulae for excitation energies as well as B(E1), B(M1), B(E2) and B(E3) values for a number of transitions between low-lying states.
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http://hal.in2p3.fr/in2p3-00014913
Contributor : Michel Lion <>
Submitted on : Friday, July 7, 2006 - 1:59:51 PM
Last modification on : Thursday, February 1, 2018 - 1:33:33 AM

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N.A. Smirnova, N. Pietralla, T. Mizusaki, P. van Isacker. Interrelation between the isoscalar octupole phonon and the proton-neutron mixed-symmetry quadrupole phonon in near-spherical nuclei. Nuclear Physics A, Elsevier, 2000, 678, pp.235-257. ⟨10.1016/S0375-9474(00)00331-6⟩. ⟨in2p3-00014913⟩

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