New multi-phonon gamma vibrational bands in A∼110 neutron-rich nuclei

• Published in: Science China. Physics, mechanics & astronomy Vol. 54; no. Suppl 1; pp. 44 - 48
• Main Authors: Zhu, ShengJiang, Wang, JianGuo, Gu, Long, Hamilton, J. H., Ramayya, A. V., Luo, YiXiao, Rasmussen, J. O., Hwang, J. K., Ding, HuaiBo, Li, Ke, Liu, ShaoHua, Yeoh, E. Y., Xu, Qiang, Xiao, ZhiGang
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science China Press 01.08.2011; Springer Nature B.V
• Subjects: Astronomy; Californium isotopes; Classical and Continuum Physics; Nuclei; Observations and Techniques; Phonons; Physics; Physics and Astronomy; Research Paper; γ-vibrational bands; neutron-rich nucleus; high spin states
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-011-4417-7

The high spin states of neutron-rich 103 Nb, 107 Tc and 109 Tc nuclei in A ∼110 region have been investigated by measuring prompt γ-γ-γ coincident measurements populated with the spontaneous fission of 252 Cf with the Gammasphere detector array. In 103 Nb, one-phonon K = 9/2 and two-phonon K = 13/2 γ-vibrational bands have been identified. In 107 Tc and 109 Tc, one-phonon K = 11/2 and two-phonon K = 15/2 γ-vibrational bands, in which the zero-phonon bands are based on K =7/2 excited states, have also been identified. The two-phonon bands are first observed in odd- Z nuclei. The characteristics for these band structures have been discussed.