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Título: | Role of the Δ Resonance in the Population of a Four-Nucleon State in the Fe 56 → Fe 54 Reaction at Relativistic Energies |
Autor: | Podolyák, Z.; Pérez-Vidal, R.M.; Gadea, Andrés CSIC ORCID; González, V.; Jungclaus, Andrea CSIC ORCID; Quintana, B.; Sanchis, E. | Fecha de publicación: | 23-nov-2016 | Editor: | American Physical Society | Citación: | Physical Review Letters 117: 222302 (2016) | Resumen: | The Fe54 nucleus was populated from a Fe56 beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the Fe56 ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of Fe54, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in Fe54 is a consequence of the quark structure of the nucleons. © 2016 American Physical Society | Descripción: | Z. Podolyák et al. ; 6 pags.; 5 figs. | Versión del editor: | https://doi.org/10.1103/PhysRevLett.117.222302 | URI: | http://hdl.handle.net/10261/152111 | DOI: | 10.1103/PhysRevLett.117.222302 | Identificadores: | doi: 10.1103/PhysRevLett.117.222302 issn: 1079-7114 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos (IFIC) Artículos |
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