Precise branching ratios to unbound 12C states from 12N and 12B [beta]-decays
Journal article, 2009
Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B [beta]-decays. In the first the three [alpha]-particles emitted after [beta]-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three [alpha]-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of [similar, equals]2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.
Author
S. Hyldegaard
Aarhus University
Christian Forssen
Chalmers, Applied Physics, Subatomic Physics
C. A. Diget
University of York
M. Alcorta
CSIC - Instituto de Estructura de la Materia (IEM)
F.C. Barker
Australian National University
B. Bastin
KU Leuven
M. J. G. Borge
CSIC - Instituto de Estructura de la Materia (IEM)
R. Boutami
CSIC - Instituto de Estructura de la Materia (IEM)
S. Brandenburg
Kernfysisch Versneller Institut
J. Büscher
KU Leuven
P. Dendooven
Kernfysisch Versneller Institut
P. Van Duppen
KU Leuven
T. Eronen
University of Jyväskylä
S. Fox
University of York
B. Fulton
University of York
H. O. U. Fynbo
Aarhus University
J. Huikari
University of Jyväskylä
M. Huyse
KU Leuven
H. B. Jeppesen
Lawrence Berkeley National Laboratory
A. Jokinen
University of Jyväskylä
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
K. Jungmann
Kernfysisch Versneller Institut
A. Kankainen
University of Jyväskylä
O. Kirsebom
Aarhus University
M. Madurga
CSIC - Instituto de Estructura de la Materia (IEM)
I. Moore
University of Jyväskylä
P. Navrátil
Lawrence Livermore National Laboratory
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
Göran Hugo Nyman
Chalmers, Applied Physics, Subatomic Physics
G.J.G. Onderwater
Kernfysisch Versneller Institut
H. Penttilä
University of Jyväskylä
K. Peräjärvi
University of Jyväskylä
R. Raabe
KU Leuven
K. Riisager
Aarhus University
S. Rinta-Antila
University of Jyväskylä
A. Rogachevskiy
Kernfysisch Versneller Institut
A. Saastamoinen
University of Jyväskylä
M. Sohani
Kernfysisch Versneller Institut
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
E. Traykov
Kernfysisch Versneller Institut
James P. Vary
Iowa State University
Y. Wang
University of Jyväskylä
K. Wilhelmsen
Chalmers
H.W. Wilschut
Kernfysisch Versneller Institut
J. Aysto
University of Jyväskylä
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 678 5 459 - 464Subject Categories
Subatomic Physics
Astronomy, Astrophysics and Cosmology
DOI
10.1016/j.physletb.2009.06.064