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Exploration of the exotic structure of deformation nuclei by complex momentum representation method

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Abstract

The discovery of halos, one of the most interesting phenomena in exotic nuclei, has opened up a new field in nuclear physics. To understand this unique property, the level structures of \(^{14}\)B, \(^{15}\)C, \(^{22}\)N, \(^{23}\)O, \(^{24}\)F, and \(^{25}\)Ne are studied with the complex momentum representation (CMR) method. We calculate the single-particle energies of bound and resonant states, and examine the occupation probabilities, density distribution, wavefunctions of the valence neutron occupied levels, and the root mean square (RMS) radii of the single-particle orbits. These results show that \(^{14}\)B, \(^{15}\)C, and \(^{22}\)N are neutron halo nuclei dominated by s-wave configurations in \(-0.08\le \beta _{2}\le 0\), \(0.1\le \beta _{2}\le 0.3\), and \(-0.1\le \beta _{2}\le 0.08\), respectively. Although the last valence neutron of \(^{23}\)O, \(^{24}\)F, and \(^{25}\)Ne all occupy the 2\(s_{1/2}\) orbit (the orbit with a dominant s-wave configuration), the single-particle levels occupied by the valence neutrons are rather bound. It implies a neutron skin structure in \(^{23}\)O, \(^{24}\)F, and \(^{25}\)Ne with spherical shape or prolate deformation. The halo phenomena are not only related to the orbital occupied by the last valence neutron but also to its separation energy. This prediction has reference value for further exploration of neutron halo in experiments.

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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The datasets generated or analyzed during the current studies are available from the corresponding author on reasonable request. The data are not publicly available due to privacy or ethical restrictions.]

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Acknowledgements

This work was partly supported by the National Natural Science Foundation of China under Grants No. 12205001 and No. 11935001; the scientific research program of Anhui University of Finance and Economics under Grant No. ACKYC22080.

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Authors and Affiliations

  1. School of Management Science and Engineering, Anhui University of Finance and Economics, Bengbu, 233030, China

    Xue Wu, Guo-Rui Yin, Xue-Neng Cao & Jia-Qun Wang

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  1. Xue Wu
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  2. Guo-Rui Yin
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  3. Xue-Neng Cao
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  4. Jia-Qun Wang
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Correspondence to Xue-Neng Cao or Jia-Qun Wang.

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Communicated by Takashi Nakatsukasa.

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Wu, X., Yin, GR., Cao, XN. et al. Exploration of the exotic structure of deformation nuclei by complex momentum representation method. Eur. Phys. J. A 60, 26 (2024). https://doi.org/10.1140/epja/s10050-024-01246-1

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