Observation and spectroscopy of the proton-unbound nucleus 21Al
Journal article, 2024
We report on the observation of the previously unknown isotope Al-21, the first unbound aluminum isotope located beyond the proton dripline. The Al-21 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 Mg-20+p. The 1p-decay energies of the ground and low-lying excited states of Al-21, its mass excess, and the proton separation energy value S-p=-1.15(-0.07)(+0.10) MeV were determined.
Author
D. Kostyleva
Helmholtz Association of German Research Centres
X. -D. Xu
Chinese Academy of Sciences
Helmholtz Association of German Research Centres
I. Mukha
Helmholtz Association of German Research Centres
L. Acosta
Spanish National Research Council (CSIC)
Universidad Nacional Autónoma de México
M. Bajzek
Helmholtz Association of German Research Centres
University of Zagreb
Justus Liebig University Giessen
E. Casarejos
University of Vigo
A. A. Ciemny
University of Warsaw
D. Cortina-Gil
Universidade de Santiagode Compostela
W. Dominik
University of Warsaw
J. A. Duenas
University of Huelva
J. M. Espino
University of Seville
A. Estrade
University of Edinburgh
Central Michigan University
F. Farinon
Helmholtz Association of German Research Centres
A. Fomichev
Joint Institute for Nuclear Research (JINR)
H. Geissel
Helmholtz Association of German Research Centres
Justus Liebig University Giessen
J. Gomez-Camacho
University of Seville
A. Gorshkov
Joint Institute for Nuclear Research (JINR)
L. V. Grigorenko
Joint Institute for Nuclear Research (JINR)
National Research Nuclear University
National Research Centre "Kurchatov Institute"
Z. Janas
University of Warsaw
G. Kaminski
University of Warsaw
Joint Institute for Nuclear Research (JINR)
O. Kiselev
Helmholtz Association of German Research Centres
R. Knoebel
Helmholtz Association of German Research Centres
Justus Liebig University Giessen
A. A. Korsheninnikov
National Research Centre "Kurchatov Institute"
S. Krupko
Joint Institute for Nuclear Research (JINR)
M. Kuich
University of Warsaw
Warsaw University of Technology
N. Kurz
Helmholtz Association of German Research Centres
Yu. A. Litvinov
Helmholtz Association of German Research Centres
G. Marquinez-Duran
University of Huelva
I. Martel
University of Huelva
C. Mazzocchi
University of Warsaw
E. Yu. Nikolskii
Joint Institute for Nuclear Research (JINR)
National Research Centre "Kurchatov Institute"
C. Nociforo
Helmholtz Association of German Research Centres
A. K. Orduz
Large Heavy Ion National Accelerator (GANIL)
M. Pfuetzner
Helmholtz Association of German Research Centres
University of Warsaw
S. Pietri
Helmholtz Association of German Research Centres
M. Pomorski
University of Warsaw
A. Prochazka
Helmholtz Association of German Research Centres
C. Rodriguez-Tajes
Universidade de Santiagode Compostela
S. Rymzhanova
Joint Institute for Nuclear Research (JINR)
A. M. Sanchez-Benitez
University of Huelva
C. Scheidenberger
Helmholtz Association of German Research Centres
H. Simon
Helmholtz Association of German Research Centres
B. Sitar
Comenius University in Bratislava
R. Slepnev
Joint Institute for Nuclear Research (JINR)
M. Stanoiu
IFIN HH
P. Strmen
Comenius University in Bratislava
K. Suemmerer
Helmholtz Association of German Research Centres
I. Szarka
Comenius University in Bratislava
M. Takechi
Helmholtz Association of German Research Centres
Y. K. Tanaka
University of Tokyo
Helmholtz Association of German Research Centres
H. Weick
Helmholtz Association of German Research Centres
J. S. Winfield
Helmholtz Association of German Research Centres
P. J. Woods
University of Edinburgh
Mikhail Zhukov
Chalmers, Physics
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 110 3 L031301Subject Categories (SSIF 2011)
Subatomic Physics
DOI
10.1103/PhysRevC.110.L031301