Chinese Physics C > 2004, Vol. 28 > Issue(S1): 75-77

Research on Two-Quasiparticle Bands in⁹⁸Sr

Department of Physics, Tsinghua University, Beijing 100084,China2 Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

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Abstract：
Through measuring high-fold prompt γ-ray coincidence events of the spontaneous fission of ²⁵²Cf with the Gammasphere detector array, rotational bands in neutron-rich ⁹⁸Sr nucleus have been investigated. A deformed K=3 band built on 1838 keV level has been confirmed and extended. Another deformed K=6 band based on 2535 keV level has been established. Both bands originate most probably from the ν _9/2[404]⊙ν _3/2[411]two-quasiparticle configuration with Ω= |Ω ₁－Ω ₂|和Ω= |Ω ₁+Ω ₂|, respectively. Based on the delay-coincidence measurements, the half-lives for the K=3 and K=6 band head levels has bee obtained to be 13±3ns and 4.5±1.0ns, respectively.

References

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LI Ming-Liang, ZHU Sheng-Jiang, CHE Xing-Lai and YU Ying-Nan. Research on Two-Quasiparticle Bands in ⁹⁸Sr[J]. Chinese Physics C, 2004, 28(S1): 75-77.

LI Ming-Liang, ZHU Sheng-Jiang, CHE Xing-Lai and YU Ying-Nan. Research on Two-Quasiparticle Bands in ⁹⁸Sr[J]. Chinese Physics C, 2004, 28(S1): 75-77. shu

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Received: 2004-12-30
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Research on Two-Quasiparticle Bands in⁹⁸Sr

Corresponding author:LI Ming-Liang,

Department of Physics, Tsinghua University, Beijing 100084,China2 Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received Date:2004-12-30
Accepted Date:1900-01-01
Available Online:2004-04-02

Abstract:Through measuring high-fold prompt γ-ray coincidence events of the spontaneous fission of²⁵²Cf with the Gammasphere detector array, rotational bands in neutron-rich⁹⁸Sr nucleus have been investigated. A deformed K=3 band built on 1838 keV level has been confirmed and extended. Another deformed K=6 band based on 2535 keV level has been established. Both bands originate most probably from the ν_9/2[404]⊙ν_3/2[411]two-quasiparticle configuration with Ω= |Ω₁－Ω₂|和Ω= |Ω₁+Ω₂|, respectively. Based on the delay-coincidence measurements, the half-lives for the K=3 and K=6 band head levels has bee obtained to be 13±3ns and 4.5±1.0ns, respectively.