Beyond the neutron drip line: The unbound oxygen isotopes O-25 and O-26
Journal article, 2013
The very neutron-rich oxygen isotopes O-25 and O-26 are investigated experimentally and theoretically. The unbound states are populated in an experiment performed at the R3B-LAND setup at GSI via proton-knockout reactions from F-26 and F-27 at relativistic energies around 442 and 414 MeV/nucleon, respectively. From the kinematically complete measurement of the decay into O-24 plus one or two neutrons, the O-25 ground-state energy and width are determined, and upper limits for the O-26 ground-state energy and lifetime are extracted. In addition, the results provide indications for an excited state in O-26 at around 4 MeV. The experimental findings are compared to theoretical shell-model calculations based on chiral two- and three-nucleon (3N) forces, including for the first time residual 3N forces, which are shown to be amplified as valence neutrons are added.
particle stability
relativistic heavy-ions
detector
rich nuclei
Author
C. Caesar
J. Simonis
T. Adachi
Yuliya Aksyutina
J. Alcantara
S. Altstadt
H. Alvarez-Pol
N. Ashwood
T. Aumann
V. Avdeichikov
M. Barr
S. Beceiro
D. Bemmerer
J. Benlliure
C. A. Bertulani
K. Boretzky
M. J. G. Borge
G. Burgunder
M. Caamano
E. Casarejos
W. Catford
J. Cederkall
S. Chakraborty
M. Chartier
L. Chulkov
D. Cortina-Gil
U. D. Pramanik
Paloma Diaz Fernandez
I. Dillmann
Z. Elekes
J. Enders
O. Ershova
A. Estrade
F. Farinon
L. M. Fraile
M. Freer
M. Freudenberger
H. O. U. Fynbo
D. Galaviz
H. Geissel
R. Gernhauser
P. Golubev
D. G. Diaz
Julius Hagdahl
Chalmers, Applied Physics, Subatomic Physics
T. Heftrich
M. Heil
M. Heine
Andreas Martin Heinz
Chalmers, Applied Physics, Subatomic Physics
A. Henriques
M. Holl
J. D. Holt
G. Ickert
A. Ignatov
B. Jakobsson
Håkan T Johansson
Chalmers, Applied Physics, Subatomic Physics
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
N. Kalantar-Nayestanaki
R. Kanungo
A. Kelic-Heil
R. Knobel
T. Kroll
R. Krucken
J. Kurcewicz
M. Labiche
C. Langer
T. Le Bleis
R. Lemmon
O. Lepyoshkina
Simon Lindberg
Chalmers, Applied Physics, Subatomic Physics
J. Machado
J. Marganiec
V. Maroussov
J. Menendez
M. Mostazo
A. Movsesyan
A. Najafi
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
C. Nociforo
V. Panin
A. Perea
S. Pietri
R. Plag
A. Prochazka
A. Rahaman
G. Rastrepina
R. Reifarth
G. Ribeiro
M. V. Ricciardi
C. Rigollet
K. Riisager
M. Roder
D. Rossi
J. S. del Rio
D. Savran
H. Scheit
A. Schwenk
H. Simon
O. Sorlin
V. Stoica
B. Streicher
J. Taylor
Olof Tengblad
S. Terashima
Ronja Thies
Chalmers, Applied Physics, Subatomic Physics
Y. Togano
E. Uberseder
J. van de Walle
P. Velho
V. Volkov
A. Wagner
F. Wamers
H. Weick
M. Weigand
C. Wheldon
G. Wilson
C. Wimmer
J. S. Winfield
P. Woods
D. Yakorev
Mikhail Zhukov
Chalmers, Applied Physics, Subatomic Physics
A. Zilges
M. Zoric
K. Zuber
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 88 3 034313Subject Categories
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1103/PhysRevC.88.034313