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High spin states in stable nucleus 84Sr

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Abstract

High spin states of 84Sr were populated through the reaction 70Zn(18O, 4n)84Sr at 75 MeV beam energy. Measurement of excitation function, γ-γ coincidences, directional correlation from oriented state (DCO) ratios and γ-transition intensities were performed using eight anticompton HPGe detectors and one planar HPGe detector. Based on the measured results, a new level scheme of 84Sr was established in which 12 new states and nearly 30 new γ-transitions were identified in the present work. The positive-parity states of the new level scheme were compared with the results from calculations in the framework of the projected shell model (PSM). One negative-parity band was extended to spin I π=19− and it can be found that in the high spin states, the γ-transition energies show the nature of signature staggering. The negative-parity band levels are in good agreement with deformed configuration-mixing shell model (DCM) calculations.

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Authors and Affiliations

  1. Key Laboratory of Nuclear Resources and Environment (East China Institute of Technology), Ministry of Education, Nanchang, 330013, China

    XuZhong Kang & ShuiFa Shen

  2. School of Nuclear Engineering and Technology, East China Institute of Technology, Fuzhou, 344000, China

    XuZhong Kang & ShuiFa Shen

  3. Department of Physics, Liaoning Normal University, Dalian, 116029, China

    ShuiFa Shen & Feng Pan

  4. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, 70803-4001, USA

    ShuiFa Shen, Feng Pan & J. P. Draayer

  5. School of Physics, Shandong University, **an, 250100, China

    GuangBing Han

  6. China Institute of Atomic Energy, Bei**g, 102413, China

    JianZhong Gu, **aoGuang Wu & LiHua Zhu

  7. Department of Physics, North University of China, Taiyuan, 030051, China

    TingDun Wen

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  1. XuZhong Kang
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  2. ShuiFa Shen
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  4. Feng Pan
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Correspondence to ShuiFa Shen.

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Kang, X., Shen, S., Han, G. et al. High spin states in stable nucleus 84Sr. Sci. China Phys. Mech. Astron. 53, 1861–1867 (2010). https://doi.org/10.1007/s11433-010-4123-x

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  • DOI: https://doi.org/10.1007/s11433-010-4123-x

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