학술논문
New states in 18 Na and 19 Mg observed in the two-proton decay of 19 Mg.
Document Type
Article
Author
Mukha, I.; Grigorenko, L.; Acosta, L.; Alvarez, M. A. G.; Casarejos, E.; Chatillon, A.; Cortina-Gil, D.; Espino, J. M.; Fomichev, A.; García-Ramos, J. E.; Geissel, H.; Gómez-Camacho, J.; Hofmann, J.; Kiselev, O.; Korsheninnikov, A.; Scheidenberger, C.; Stanoiu, M.; Sümmerer, K.; Weick, H.; Woods, P. J.
Source
Subject
*MAGNESIUM isotopes
*PROTON decay
*SODIUM
*SCIENTIFIC observation
*TRAJECTORIES (Mechanics)
*NUCLEAR counters
*NUCLEAR energy
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Language
ISSN
0556-2813
Abstract
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. [ABSTRACT FROM AUTHOR]