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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2016, Vol. 40> Issue(11) : 114103 DOI: 10.1088/1674-1137/40/11/114103

Band head spin assignment of superdeformed bands in 86Zr

  • 1.

     Dr. B. R. Ambedkar National Institute of Technology, Jalandhar 144011, India

  • Two parameter expressions for rotational spectra viz. variable moment of inertia (VMI), ab formula and three parameter Harris ω2 expansion are used to assign the band head spins (I0) of four rotational superdeformed bands in 86Zr. The least-squares fitting method is employed to obtain the band head spins of these four bands in the A~80 mass region. Model parameters are extracted by fitting of intraband γ-ray energies, so as to obtain a minimum root-mean-square (rms) deviation between the calculated and the observed transition energies. The calculated transition energies are found to depend sensitively on the assigned spins. Whenever an accurate band head spin is assigned, the calculated transition energies are in agreement with the experimental transition energies. The dynamic moment of inertia is also extracted and its variation with rotational frequency is investigated. Since a better agreement of band head spin with experimental results is found using the VMI model, it is a more powerful tool than the ab formula and Harris ω2 expansion.
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  • References

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Anshul Dadwal and H. M. Mittal. Band head spin assignment of superdeformed bands in 86Zr[J]. Chinese Physics C, 2016, 40(11): 114103. doi: 10.1088/1674-1137/40/11/114103
Anshul Dadwal and H. M. Mittal. Band head spin assignment of superdeformed bands in 86Zr[J]. Chinese Physics C, 2016, 40(11): 114103.  doi: 10.1088/1674-1137/40/11/114103 shu
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Band head spin assignment of superdeformed bands in 86Zr

    Corresponding author: H. M. Mittal, mittal.hm@lycos.com
  • 1. Dr. B. R. Ambedkar National Institute of Technology, Jalandhar 144011, India
  • Received Date: 2016-08-22
  • Available Online: 2016-11-05

Abstract: Two parameter expressions for rotational spectra viz. variable moment of inertia (VMI), ab formula and three parameter Harris ω2 expansion are used to assign the band head spins (I0) of four rotational superdeformed bands in 86Zr. The least-squares fitting method is employed to obtain the band head spins of these four bands in the A~80 mass region. Model parameters are extracted by fitting of intraband γ-ray energies, so as to obtain a minimum root-mean-square (rms) deviation between the calculated and the observed transition energies. The calculated transition energies are found to depend sensitively on the assigned spins. Whenever an accurate band head spin is assigned, the calculated transition energies are in agreement with the experimental transition energies. The dynamic moment of inertia is also extracted and its variation with rotational frequency is investigated. Since a better agreement of band head spin with experimental results is found using the VMI model, it is a more powerful tool than the ab formula and Harris ω2 expansion.

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