Elsevier

Nuclear Physics A

Volume 419, Issue 3, 14 May 1984, Pages 589-620
Nuclear Physics A

Collective and single-particle degrees of freedom in 104Ru

https://doi.org/10.1016/0375-9474(84)90635-3Get rights and content

Abstract

A previous multiple Coulomb excitation experiment on 104Ru using 208Pb projectiles has been extended to larger scattering angles by bombarding a thin 208Pb target with a 4.6 MeV/u 104Ru beam. A new experimental set-up allowed pγγ triple coincidences and pγ directional correlations to be measured, which could be used to extend the level scheme up to Iπ = 10+ in the ground-state band and Iπ = 8+ in the γ-band. Corresponding intraband and interband B(E2) values and static quadrupole moments for the ground-state band are deduced from the combined information of the two experiments and the collective structure is discussed in the framework of different collective models. Both the level energies of the 10+ member of the ground-state band and of the 8+ member of the γ-band deviate considerably from what is expected for unperturbed rotational bands. To explain these irregularities observed at higher spins, calculations within the triaxial cranked shell model have been performed.

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