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
X. -D. Xu
Chinese Academy of Sciences
Helmholtz
I. Mukha
Helmholtz
L. Acosta
Spanish National Research Council (CSIC)
Universidad Nacional Autónoma de México
M. Bajzek
Helmholtz
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
A. Fomichev
Joint Institute for Nuclear Research (JINR)
H. Geissel
Justus Liebig University Giessen
Helmholtz
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
R. Knoebel
Justus Liebig University Giessen
Helmholtz
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
Yu. A. Litvinov
Helmholtz
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
A. K. Orduz
Grand Accelerateur Nacl Ions Lourds GANIL
M. Pfuetzner
Helmholtz
University of Warsaw
S. Pietri
Helmholtz
M. Pomorski
University of Warsaw
A. Prochazka
Helmholtz
C. Rodriguez-Tajes
Universidade de Santiagode Compostela
S. Rymzhanova
Joint Institute for Nuclear Research (JINR)
A. M. Sanchez-Benitez
University of Huelva
C. Scheidenberger
GSI Helmholtz Ctr Heavy Ion Res
H. Simon
Helmholtz
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
I. Szarka
Comenius University in Bratislava
M. Takechi
Helmholtz
Y. K. Tanaka
University of Tokyo
Helmholtz
H. Weick
Helmholtz
J. S. Winfield
Helmholtz
P. J. Woods
University of Edinburgh
Mikhail Zhukov
Chalmers, Physics
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 110 3 L031301Subject Categories
Subatomic Physics
DOI
10.1103/PhysRevC.110.L031301