Development of axial asymmetry in the neutron-rich nucleus 110Mo

H. Watanabe, K. Yamaguchi, A. Odahara, T. Sumikama, S. Nishimura, K. Yoshinaga, Z. Li, Y. Miyashita, K. Sato, L. Próchniak, H. Baba, J. S. Berryman, N. Blasi, A. Bracco, F. Camera, J. Chiba, P. Doornenbal, S. Go, T. Hashimoto, S. HayakawaC. Hinke, N. Hinohara, E. Ideguchi, T. Isobe, Y. Ito, D. G. Jenkins, Y. Kawada, N. Kobayashi, Y. Kondo, R. Krücken, S. Kubono, G. Lorusso, T. Nakano, T. Nakatsukasa, M. Kurata-Nishimura, H. J. Ong, S. Ota, Z. S. Podolyák, H. Sakurai, H. Scheit, K. Steiger, D. Steppenbeck, K. Sugimoto, K. Tajiri, S. Takano, A. Takashima, T. Teranishi, Y. Wakabayashi, P. M. Walker, O. Wieland, H. Yamaguchi

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The neutron-rich nucleus 110Mo has been investigated by means of γ-ray spectroscopy following the β-decay of 110Nb, produced using in-flight fission of a 238U beam at 345 MeV/nucleon at the RIBF facility. In addition to the ground-band members reported previously, spectroscopic information on the low-lying levels of the quasi-γ band built on the second 2+ state at 494 keV has been obtained for the first time. The experimental finding of the second 2+ state being lower than the yrast 4+ level suggests that axially-asymmetric γ softness is substantially enhanced in this nucleus. The experimental results are compared with model calculations based on the general Bohr Hamiltonian method. The systematics of the low-lying levels in even-even A≈110 nuclei is discussed in comparison with that in the neutron-rich A≈190 region, by introducing the quantity ES/E(21+), ES=E(22+)-E(41+), as a global signature of the structural evolution involving axial asymmetry.

Original languageEnglish
Pages (from-to)270-275
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4
Publication statusPublished - Oct 19 2011


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Watanabe, H., Yamaguchi, K., Odahara, A., Sumikama, T., Nishimura, S., Yoshinaga, K., ... Yamaguchi, H. (2011). Development of axial asymmetry in the neutron-rich nucleus 110Mo. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 704(4), 270-275.