Observation and spectroscopy of the proton-unbound nucleus Al 21
Kostyleva D.
Xu X.
Mukha I.
Acosta L.
Bajzek M.
Casarejos E.
Ciemny A.A.
Cortina-Gil D.
Dominik W.
Dueñas J.A.
Espino J.M.
Estrade A.
Farinon F.
Fomichev A.
Geissel H.
Gomez-Camacho J.
Gorshkov A.
Grigorenko L.
Janas Z.
Kaminski G.
Kiselev O.
Knobel R.
Korsheninnikov A.
Krupko S.
Kuich M.
Kurz N.
Litvinov Y.A.
Marquinez-Duran G.
Martel I.
Mazzocchi C.
Nikolskii E.Yu.
Nociforo C.
Orduz A.K.
Pfutzner M.
Pietri S.
Pomorski M.
Pomorski M.
Prochazka A.
Rodriguez-Tajes C.
Rymzhanova S.
Sánchez A.M.
Scheidenberger C.
Simon H.
Sitar B.
Slepnev R.
Stanoiu M.
Strmen P.
Summerer K.
Szarka I.
Takechi M.
Tanaka Y.K.
Weick H.
Winfield J.S.
Woods P.J.
Woods P.J.
Zhukov M.
Physical Review C
Doi 10.1103/PhysRevC.110.L031301
Volumen 110
2024-09-01
Citas: 1
© 2024 American Physical Society.We report on the observation of the previously unknown isotope Al21, the first unbound aluminum isotope located beyond the proton dripline. The Al21 nucleus decays by one-proton (1p) emission, and its in-flight decays were detected by tracking trajectories of the decay products with silicon microstrip detectors. The 1p-emission processes were studied by analyzing the measured angular correlations of decay products Mg20+p. The 1p-decay energies of the ground and low-lying excited states of Al21, its mass excess, and the proton separation energy value Sp=-1.15-0.07+0.10 MeV were determined.
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