Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around 270Hs |
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| Authors: | Xiao-Qian Wang Xiang-Xiang Sun Shan-Gui Zhou |
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| Affiliation: | 1. CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190, China2. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China3. School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | We investigate the effects of higher-order deformations \begin{document}$\beta_\lambda$\end{document}![]() ![]() (\begin{document}$\lambda=4,6,8,$\end{document}![]() ![]() and 10) on the ground state properties of superheavy nuclei (SHN) near the doubly magic deformed nucleus \begin{document}$^{270}{\rm{Hs}}$\end{document}![]() ![]() using the multidimensionally-constrained relativistic mean-field (MDC-RMF) model with five effective interactions: PC-PK1, PK1, NL3*, DD-ME2, and PKDD. The doubly magic properties of \begin{document}$^{270}{\rm{Hs}}$\end{document}![]() ![]() include large energy gaps at \begin{document}$N=162$\end{document}![]() ![]() and \begin{document}$Z=108$\end{document}![]() ![]() in the single-particle spectra. By investigating the binding energies and single-particle levels of \begin{document}$^{270}{\rm{Hs}}$\end{document}![]() ![]() in the multidimensional deformation space, we find that, among these higher-order deformations, the deformation \begin{document}$\beta_6$\end{document}![]() ![]() has the greatest impact on the binding energy and influences the shell gaps considerably. Similar conclusions hold for other SHN near \begin{document}$^{270}{\rm{Hs}}$\end{document}![]() ![]() . Our calculations demonstrate that the deformation \begin{document}$\beta_6$\end{document}![]() ![]() must be considered when studying SHN using MDC-RMF. |
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| Keywords: | density functional theory superheavy nuclei deformation effects |
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