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Fission barriers of actinide nuclei with nuclear density functional theory: influence of the triaxial deformation

  • Regular Article –Theoretical Physics
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Abstract

The fission pathway of even–even actinide nuclei have been systematically calculated using the deformation-constrained nuclear density functional theory beyond the second fission barriers within the UNEDF1 energy-density functionals (EDFs). Our calculated results show that, allowing for triaxial deformation, the second fission barriers are lowered by a few hundreds of keV to 2 MeV. For the heaviest actinides, it is found that inclusion of triaxial deformation reduces the outer barrier significantly.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All relevant data are already given in the figures and in the table.]

Notes

  1. The experimental EB1, EB2, and \(E_\mathrm{II}\) values are obtained by fitting them to reproduce a variety of measured properties associated with the fission reactions of actinides featuring the double-humped barriers. For details, see Refs. [41, 42].

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Acknowledgements

The current work is supported by National Natural Science Foundation of China (Grant no. 11705038). We thank the HEPC Studio at Physics School of Harbin Institute of Technology for access to high performance computing resources through INSPUR-HPC@hepc.hit.edu.cn.

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Authors and Affiliations

  1. Department of Physics, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China

    Chen Ling, Chao Zhou & Yue Shi

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  1. Chen Ling
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  2. Chao Zhou
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  3. Yue Shi
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Correspondence to Yue Shi.

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Communicated by Michael Bender.

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Ling, C., Zhou, C. & Shi, Y. Fission barriers of actinide nuclei with nuclear density functional theory: influence of the triaxial deformation. Eur. Phys. J. A 56, 180 (2020). https://doi.org/10.1140/epja/s10050-020-00182-0

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