Collective bands in 104,106,108Mo

Physics of Atomic Nuclei - Tập 69 - Trang 1198-1203 - 2006
E. F. Jones1, P. M. Gore1, S. J. Zhu1,2,3, J. H. Hamilton1, A. V. Ramayya1, J. K. Hwang1, R. Q. Xu2, L. M. Yang2, K. Li1, Z. Jiang2, Z. Zhang2, S. D. Xiao2, X. Q. Zhang1, W. C. Ma4, J. D. Cole5, M. W. Drigert5, I. Y. Lee6, J. O. Rasmussen7, Y. X. Luo1,7, M. A. Stoyer8
1Department of Physics, Vanderbilt University, Nashville, USA
2Department of Physics, Tsinghua University, Beijing, China
3Joint Institute for Heavy Ion Research, Oak Ridge, USA
4Department of Physics, Mississippi State University, USA
5Idaho National Engineering and Environmental Laboratory, Idaho Falls, USA
6Lawrence-Berkeley National Laboratory, Berkeley, USA
7Lawrence Berkeley National Laboratory, Berkeley, USA
8Lawrence Livermore National Laboratory, Livermore, USA

Tóm tắt

We have used our analysis of γ-γ-γ data (5.7 × 1011 triples and higher folds) taken with Gammasphere from prompt γ rays emitted in the spontaneous fission of 252Cf to study the collective bands in 104,106,108Mo. The one-phonon and two-phonon γ-vibrational bands and known two-quasiparticle bands in neutron-rich 104,106Mo were extended to higher spins. The one-and two-phonon γ-vibrational bands have remarkably close energies for transitions from the same spin states and identical moments of inertia. Several new bands are observed and are proposed as quasiparticle bands in 104,106Mo, along with the first β-type vibrational band in 106Mo. The quasiparticle bands have essentially constant moments of inertia near the rigid-body value that indicate blocking of the pairing interaction. Candidates for chiral doublet bands in 106Mo are strong. These are the first reported chiral vibrational bands in an even-even nucleus.

Tài liệu tham khảo

Y. X. Luo et al., Phys. Rev. C 64, 054306 (2001). D. Radford, Nucl. Instrum. Methods Phys. Res. A 361, 297 (1995). S. Frauendorf et al., Rev. Mod. Phys. 73, 463 (2001). C. Vaman et al., Phys. Rev. Lett. 92, 032501 (2004). S. J. Zhu et al. (in press).
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Physics of Atomic Nuclei

Tập 69

1198-1203

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