Branching ratios in the beta decays of N-12 and B-12
Journal article, 2009
Absolute branching ratios to unbound states in C-12 populated in the beta decays of N-12 and B-12 are reported. Clean sources of N-12 and B-12 were obtained using the isotope separation on-line (ISOL) method. The relative branching ratios to the different populated states were extracted using single-alpha as well as complete kinematics triple-alpha spectra. These two largely independent methods give consistent results. Absolute normalization is achieved via the precisely known absolute branching ratio to the bound 4.44 MeV state in C-12. The extracted branching ratios to the unbound states are a factor of three more precise than previous measurements. Branching ratios in the decay of Na-20 are also extracted and used to check the results.
n12
alpha-particles
state
b12
c-12
Author
S. Hyldegaard
C. A. Diget
M. J. G. Borge
R. Boutami
P. Dendooven
T. Eronen
S. P. Fox
L. M. Fraile
B. R. Fulton
H. O. U. Fynbo
J. Huikari
H. B. Jeppesen
A. S. Jokinen
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
A. Kankainen
I. Moore
Göran Hugo Nyman
Chalmers, Applied Physics, Subatomic Physics
H. Penttila
K. Perajarvi
K. Riisager
S. Rinta-Antila
Olof Tengblad
Y. Wang
Katarina Wilhelmsen
Chalmers, Applied Physics, Subatomic Physics
J. Aysto
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 80 4Subject Categories
Subatomic Physics
Astronomy, Astrophysics and Cosmology
DOI
10.1103/PhysRevC.80.044304