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Title: | Excitation of Δ andN*resonances in isobaric charge-exchange reactions of heavy nuclei | Authors: | Vidana, I. Benlliure, J. Geissel, H. Lenske, H. Scheidenberger, C. Vargas, J. |
Issue Date: | 2016 | Project: | project PEst-OE/FIS/UI0405/2014 developed under the initiative QREN financed by the UE/FEDER throught the program COMPETE-“Programa Operacional Factores de Competitividade”, and by “NewCompstar”, COST Action MP1304 | Serial title, monograph or event: | EPJ Web of Conferences | Volume: | 107 | Abstract: | We present a model for the study of the excitation of Δ(1232) and N∗(1440) resonances in isobaric charge-exchange (AZ, A(Z ± 1)) reactions of heavy nuclei. Quasi-elastic and inelastic elementary processes contributing to the double differential cross sections of the reactions are described in terms of the exchange of virtual pions. The inelastic channel includes processes where the resonances are excited both in the target and in the projectile nucleus. We present results for reactions of 112Sn and 124Sn on different targets. Our results confirm that the position of the Δ peak is insensitive to targets with mass number A ≥ 12, and show that the origin of the Δ peak shift towards low excitation energies, with respect to its position in reactions with a proton target, can be easily explained in terms of the superposition of the different excitation mechanisms contributing to the reaction. | URI: | https://hdl.handle.net/10316/102545 | ISSN: | 2100-014X | DOI: | 10.1051/epjconf/201610710003 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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