Towards the Limits of Existence of Nuclear Structure: Observation and First Spectroscopy of the Isotope K-31 by Measuring Its Three-Proton Decay
Journal article, 2019
The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: K-31. It is unbound with respect to three-proton (3p) emission, and its decays have been detected in flight by measuring the trajectories of all decay products using microstrip detectors. The 3p emission processes have been studied by the means of angular correlations of S-28 + 3p and the respective decay vertices. The energies of the previously unknown ground and excited states of K-31 have been determined. This provides its 3p separation energy value S-3p of -4.6(2) MeV. Upper half-life limits of 10 ps of the observed K-31 states have been derived from distributions of the measured decay vertices.
decay
isotopes
two-proton decay
protons
Author
D. Kostyleva
Justus Liebig University Giessen
Helmholtz
I Mukha
Helmholtz
L. Acosta
Universidad Nacional Autonoma de Mexico
National Institute for Nuclear Physics
E. Casarejos
University of Vigo
V Chudoba
Joint Institute for Nuclear Research (JINR)
Silesian University Opava
A. A. Ciemny
University of Warsaw
W. Dominik
University of Warsaw
J. A. Duenas
University of Huelva
V Dunin
Joint Institute for Nuclear Research (JINR)
J. M. Espino
University of Seville
A. Estrade
University of Edinburgh
F. Farinon
Helmholtz
A. Fomichev
Joint Institute for Nuclear Research (JINR)
H. Geissel
Justus Liebig University Giessen
Helmholtz
A. Gorshkov
Joint Institute for Nuclear Research (JINR)
Grigorenko
Joint Institute for Nuclear Research (JINR)
National Research Centre "Kurchatov Institute"
National Research Nuclear University
Z. Janas
University of Warsaw
G. Kaminski
University of Warsaw
Joint Institute for Nuclear Research (JINR)
O. Kiselev
Helmholtz
R. Knobel
Helmholtz
Justus Liebig University Giessen
S. Krupko
Joint Institute for Nuclear Research (JINR)
M. Kuich
University of Warsaw
Warsaw University of Technology
Yu A. Litvinov
Helmholtz
G. Marquinez-Duran
University of Huelva
I Martel
University of Liverpool
C. Mazzocchi
University of Warsaw
C. Nociforo
Helmholtz
A. K. Orduz
Grand Accélérateur National d'Ions Lourds (GANIL)
M. Pfutzner
University of Warsaw
Helmholtz
S. Pietri
Helmholtz
M. Pomorski
University of Warsaw
A. Prochazka
Helmholtz
S. Rymzhanova
Joint Institute for Nuclear Research (JINR)
A. M. Sanchez-Benitez
University of Huelva
C. Scheidenberger
Helmholtz
Justus Liebig University Giessen
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
I Szarka
Comenius University in Bratislava
M. Takechi
Helmholtz
Y. K. Tanaka
Helmholtz
University of Tokyo
H. Weick
Helmholtz
M. Winkler
Helmholtz
J. S. Winfield
Helmholtz
X. Xu
Helmholtz
Justus Liebig University Giessen
Chinese Academy of Sciences
Mikhail Zhukov
Chalmers, Physics
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 123 9 092502Subject Categories
Accelerator Physics and Instrumentation
Subatomic Physics
Astronomy, Astrophysics and Cosmology
DOI
10.1103/PhysRevLett.123.092502
PubMed
31524489