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 092502

Subject Categories

Accelerator Physics and Instrumentation

Subatomic Physics

Astronomy, Astrophysics and Cosmology

DOI

10.1103/PhysRevLett.123.092502

PubMed

31524489

More information

Latest update

9/15/2020