Relativistic mean-field study on proton skins and proton halos in exotic nuclei |
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| Affiliation: | 1. GANIL, BP 5027, 14021 Caen Cedex, France;2. Institute of Theoretical Physics, University of Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen, Germany;3. Department of Physics, Nanjing University, Nanjing 210008, China;1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Xi''an Jiaotong University, Xi''an 710049, China;1. Department of Physics, DAV University, Jalandhar, 144012, India;2. Department of Physics, Govt. PG College for Women, Karnal, 132001, India;3. Department of Physics, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, 131039, India;4. Department of Physics, Kurukshetra University, Kurukshetra, 136119, India;1. Department of Physics, Indian Institute of Technology, Roorkee-247667, India;2. Theory Group, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India;3. International Institute of Physics, Federal University of Rio Grande do Norte, Av. Odilon Gomes de Lima, 1722 Capim Macio, Natal, RN 59078-400, Brazil;1. Department of Physics, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, Haryana, India;2. Department of Physics, Govt. P.G. College for Women, Karnal, 132001, Haryana, India;3. Department of Physics, Kurukshetra University, Kurukshetra, 136119, Haryana, India;1. Department of Physics, Indian Institute of Technology, Roorkee 247667, India;2. Theory Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064, India;1. Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People''s Republic of China;2. School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People''s Republic of China;3. Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, Bât. 104-108, 91405 Orsay, France;4. Dipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy;5. INFN, Sezione di Padova, I-35131 Padova, Italy;6. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People''s Republic of China;7. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan;8. INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy;9. Dipartimento di Fisica e Scienze della Terra, Université di Ferrara, Ferrara, Italy;10. Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada;11. KTH Department of Physics, S-10691 Stockholm, Sweden;12. iThemba LABS, National Research Foundation, PO Box 722, 7131 Somerset West, South Africa;13. Department of Physics & Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa;14. Institute of Nuclear Research, Hungarian Academy of Sciences, 4001 Debrecen, Hungary;15. University of Warsaw, Heavy Ion Laboratory, Pasteura 5a, 02-093 Warsaw, Poland |
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| Abstract: | We investigate the ground state properties of proton-rich nuclei in the framework of the relativistic mean-field model. Calculations show that the experimental proton halo in the nuclei 26,27,28P can be reproduced by the model. The proton halos can appear in proton-rich nuclei because the total nuclear potential is attractive up to the radial distance r ≈ 5.5 fm. But the size of proton halos is finite due to the limitation of the Coulomb potential barrier. The mean-square radius of a halo proton is not very sensitive to the separation energy of the last proton in some very proton-rich nuclei due to the effect of the Coulomb barrier. This behavior is different from the case of a neutron halo where the mean-square radius of a halo neutron is inversely proportional to the separation energy of the last halo neutron. We have also analysed the differences of the relativistic mean-field potentials of 25Al and 26P and found that the isovector potential from the p meson has an important effect on the differences. |
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