Observation of high-j quasiparticle states in Cm249 by in-beam γ-ray spectroscopy using heavy-ion transfer reactions

T. Ishii, H. Makii, M. Asai, K. Tsukada, A. Toyoshima, M. Matsuda, A. Makishima, S. Shigematsu, J. Kaneko, T. Shizuma, H. Toume, I. Hossain, T. Kohno, M. Ogawa

研究成果: ジャーナルへの寄稿学術誌査読

19 被引用数 (Scopus)

抄録

We have measured de-excitation γ rays in Cm249 populated by one-neutron stripping reactions with a Cm248 target and 162-MeV O16, 162-MeV O18, and 120-MeV C13 beams. γ rays in Cm249 were identified by measuring kinetic energies of outgoing particles using Si ΔE-E detectors. It was demonstrated that high-j orbitals were selectively populated in the (O16, O15) reaction having a large negative Q value. We have observed eight quasiparticle states above the deformed shell gap of N=152. The 1/2+[620], 1/2-[750], and 7/2+[613] bands were extended up to 19/2+, 19/2-, and 13/2+ states, respectively. We have established the 9/2,9/2+[615] state at 526 keV, the 9/2/2+[604] state with a short life of T1/22 ps at 1030 keV, and the 11/2,11/2-[725] state with T1/2=19(1) ns at 375 keV. Furthermore, the 17/21/2+[880] state, having a large component of the k17/2 spherical single-particle state, has been identified at 1505 keV. We discuss the properties of those quasiparticle states in the framework of a deformed shell model.

本文言語英語
論文番号054309
ジャーナルPhysical Review C - Nuclear Physics
78
5
DOI
出版ステータス出版済み - 11月 11 2008
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学

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