Bulg. J. Phys. vol.43 no.3 (2016), pp. 195-202

Triaxial Isomer in 103Ru

S. Kisyov1,2, S. Lalkovski1, D. Ivanova1, N. Mărginean2, D. Bucurescu2, Gh. Căta-Danil2, I. Căta-Danil2, D. Deleanu2, N. Florea2, D. Ghiţă2, T.Glodariu2, R. Lica2, R. Mărginean2, C. Mihai2, A. Negret2, C. Niţa2, A. Olacel2, S. Pascu2, P. Petkov2, T. Sava2, E.A. Stefanova3, R. Suvaila2, S. Toma2, O. Yordanov3, N.V. Zamfir2
1Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia, Bulgaria
2Horia Hulubei National Institute for Physics and Nuclear Engineering, Magurele, Romania
3Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Science, Sofia, Bulgaria
Abstract. 103Ru was produced in (α,nγ) reaction. Gamma rays, emitted by the excited nuclei, were detected by the ROSPHERE multidetector array. The half-life of the 297-keV state in 103Ru was measured by using the in-beam delayed coincidence technique. The reduced transition probability of the isomeric transition was evaluated. Rigid triaxial rotor plus particle model calculations were performed. The model shows a good description of the 103Ru level energies. The theoretical reduced transition probability for the isomeric transition is consistent with the experimental data. The isomeric state is thus interpreted as triaxial.

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