OCTUPOLE EXCITATIONS IN VIBRATIONAL NUCLEI AND THE SDF INTERACTING BOSON MODEL

M PIGNANELLI*, N BLASI, S MICHELETTI, R DELEO, MA HOFSTEE, JM SCHIPPERS, SY VANDERWERF, MN HARAKEH

*Bijbehorende auteur voor dit werk

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51 Citaten (Scopus)

Samenvatting

Proton and deuteron inelastic scattering experiments, performed with an energy resolution of 12-15 keV, have been used to study negative-parity states of vibrational and transitional nuclei with mass between 98 and 150. The analysis has been focussed on the isovector components, on the quadrupole-octupole two-phonon states and on the fragmentation of the octupole strength. This latter displays a regular dependence on the product of proton and neutron valence particle numbers and is satisfactorily reproduced by IBM-1+f-boson calculations. Other features of the experimental spectra, as the relative positions of the 3- states, exhibit a dependence on the ratio of valence particle numbers and indicate that a IBM-2 approach might be more appropriate.

Originele taal-2English
Pagina's (van-tot)567-601
Aantal pagina's35
TijdschriftNuclear Physics A
Volume519
Nummer van het tijdschrift3
StatusPublished - 10-dec-1990

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