New states in 18Na and 19Mg observed in the two-proton decay of 19Mg

Previously unknown states in 18Na and 19Mg have been studied by measuring the trajectories of their decay products with microstrip detectors. Analyzing angular correlations of the fragments provided information on decay energies and widths of the parent states. The ground state of 18Na has been dete...

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Detalhes bibliográficos
Autores: Mukha, I., Grigorenko, L., Acosta Sánchez, Luis Armando, Álvarez, M. A. G., Casarejos, E., Chatillón, A., Cortina Gil, D., Espino, José Manuel, Fomichev, A., García Ramos, José Enrique, Geissel, H., Gómez Camacho, Joaquín, Hofmann, J., Kiselev, O., Korsheninnikov, A., Kurz, N., Litvinov, Yu. A., Martel Bravo, Ismael, Nociforo, C., Ott, W., Pfützner, M., Rodríguez Tajes, C., Roeckl, E., Scheidenberger, C., Stanoiu, M., Sümmerer, K., Weick, H., Woods, P. J.
Tipo de documento: artigo
Data de publicação:2012
País:España
Recursos:Universidad de Huelva (UHU)
Repositório:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglês
OAI Identifier:oai:ariasmontano.uhu.es:10272/6097
Acesso em linha:http://hdl.handle.net/10272/6097
Access Level:Acceso aberto
Palavra-chave:Two-proton radioactivity
Radioactivity
Descrição
Resumo:Previously unknown states in 18Na and 19Mg have been studied by measuring the trajectories of their decay products with microstrip detectors. Analyzing angular correlations of the fragments provided information on decay energies and widths of the parent states. The ground state of 18Na has been detected and its one-proton decay energy of 1.23(15) MeV determined. Four previously unknown states in 19Mg at 2.1, 2.9, 3.6, and 5.2 MeV have been observed. The competition between simultaneous and sequential two-proton emission of states in 19Mg is discussed, and the conclusion of a direct mechanism of 2p radioactivity of the 19Mg ground state is confirmed.

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