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


rich nuclei


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 034313

Subject Categories

Subatomic Physics

Physical Sciences


Basic sciences



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