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Título

Migration of Nuclear Shell Gaps Studied in the d(Ne-24, p gamma)Ne-25 Reaction

AutorCaballero Ontanaya, Luis CSIC ORCID ; Rubio, Berta CSIC ORCID ; Catford, W.N.; Timis, C. N.; Lemmon, R. C.; Labiche, M.; Orr, N.A.; Fernández-Domínguez, B.; Chapman, R.; Freer, M.; Chartier, M.; Savajols, H.; Rejmund, M.; Achouri, N.L.; Amzal, N.; Ashwood, N. I.; Baldwin, T. D.; Burns, M.; Casadjian, J. M.; Curtis, N.; France, G. de; Gelletly, W.; Liang, X.; Pain, S.D.; Pucknell, V.F.E.; Sorlin, O.; Spohr, K. -M.; Theisen, Ch.; Warner, D. D.
Fecha de publicación14-may-2010
EditorAmerican Physical Society
CitaciónPhysical Review Letters 104 (19): 192501 (2010)
ResumenThe transfer of neutrons onto Ne-24 has been measured using a reaccelerated radioactive beam of Ne-24 to study the (d, p) reaction in inverse kinematics. The unusual raising of the first 3/2(+) level in Ne-25 and its significance in terms of the migration of the neutron magic number from N = 20 to N = 16 is put on a firm footing by confirmation of this state's identity. The raised 3/2(+) level is observed simultaneously with the intruder negative parity 7/2(-) and 3/2(-) levels, providing evidence for the reduction in the N = 20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2(+) state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.104.192501
URIhttp://hdl.handle.net/10261/28137
DOI10.1103/PhysRevLett.104.192501
ISSN0031-9007
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