Magicity versus Superfluidity around
O28
viewed from the Study of
F30
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Published:2024-08-23
Issue:8
Volume:133
Page:
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ISSN:0031-9007
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Container-title:Physical Review Letters
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language:en
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Short-container-title:Phys. Rev. Lett.
Author:
Kahlbow J.12ORCID, Aumann T.134, Sorlin O.5, Kondo Y.6, Nakamura T.6, Nowacki F.7, Revel A.58, Achouri N. L.8, Al Falou H.9, Atar L.1, Baba H.2, Boretzky K.3, Caesar C.13, Calvet D.10, Chae H.11, Chiga N.2, Corsi A.10, Delaunay F.8, Delbart A.10, Deshayes Q.8, Dombrádi Z.12, Douma C. A.13, Elekes Z.12, Gašparić I.142, Gheller J.-M.10, Gibelin J.8, Gillibert A.10, Harakeh M. N.313, Hirayama A.6, Holl M.13, Horvat A.13, Horváth Á.15, Hwang J. W.16, Isobe T.2, Kalantar-Nayestanaki N.13, Kawase S.17, Kim S.16, Kisamori K.2, Kobayashi T.18, Körper D.3, Koyama S.19, Kuti I.12, Lapoux V.10, Lindberg S.20, Marqués F. M.8, Masuoka S.21, Mayer J.22, Miki K.23, Murakami T.24, Najafi M.13, Nakano K.17, Nakatsuka N.24, Nilsson T.20, Obertelli A.10, Orr N. A.8, Otsu H.2, Ozaki T.6, Panin V.2, Paschalis S.1, Rossi D. M.13, Saito A. T.6, Saito T.19, Sasano M.2, Sato H.2, Satou Y.16, Scheit H.1, Schindler F.1, Schrock P.21, Shikata M.6, Shimada K.6, Shimizu Y.2, Simon H.3, Sohler D.12, Stuhl L.252, Takeuchi S.6, Tanaka M.26, Thoennessen M.23, Törnqvist H.13, Togano Y.6, Tomai T.6, Tscheuschner J.1, Tsubota J.6, Uesaka T.2, Wang H.2, Yang Z.2, Yasuda M.6, Yoneda K.2,
Affiliation:
1. Technische Universität Darmstadt 2. RIKEN Nishina Center 3. GSI Helmholtzzentrum für Schwerionenforschung 4. Helmholtz Forschungsakademie Hessen für FAIR 5. Grand Accélérateur National d’Ions Lourds (GANIL) 6. Tokyo Institute of Technology 7. Université de Strasbourg 8. Université de Caen Normandie 9. Lebanese University 10. Université Paris-Saclay 11. IBS 12. HUN-REN Institute for Nuclear Research 13. University of Groningen 14. Ruđer Bošković Institute 15. Eötvös Loránd University 16. Seoul National University 17. Kyushu University 18. Tohoku University 19. Unversity of Tokyo 20. Chalmers Tekniska Högskola 21. University of Tokyo 22. Universität zu Köln 23. Michigan State University 24. Kyoto University 25. Institute for Basic Science 26. Osaka University
Abstract
The neutron-rich unbound fluorine isotope F2130 has been observed for the first time by measuring its neutron decay at the SAMURAI spectrometer (RIBF, RIKEN) in the quasifree proton knockout reaction of Ne31 nuclei at 235 MeV/nucleon. The mass and thus one-neutron-separation energy of F30 has been determined to be Sn=−472±58(stat)±33(sys) keV from the measurement of its invariant-mass spectrum. The absence of a sharp drop in Sn(F30) shows that the “magic” N=20 shell gap is not restored close to O28, which is in agreement with our shell-model calculations that predict a near degeneracy between the neutron d and fp orbitals, with the 1p3/2 and 1p1/2 orbitals becoming more bound than the 0f7/2 one. This degeneracy and reordering of orbitals has two potential consequences: O28 behaves like a strongly superfluid nucleus with neutron pairs scattering across shells, and both F29,31 appear to be good two-neutron halo-nucleus candidates.
Published by the American Physical Society
2024
Funder
Deutsche Forschungsgemeinschaft Technische Universität Darmstadt GSI Helmholtzzentrum für Schwerionenforschung RIKEN Tokyo Institute of Technology Japan Society for the Promotion of Science Agence Nationale de la Recherche Helmholtz International Center for FAIR Hrvatska Zaklada za Znanost National Science Foundation Institute for Basic Science Ministry of Education, Culture, Sports, Science and Technology National Research, Development and Innovation Fund of Hungary Franco-Japanese LIA-International Associated Laboratory for Nuclear Structure Problems
Publisher
American Physical Society (APS)
Cited by
1 articles.
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