Evidence of a new state in Be-11 observed in the Li-11 beta-decay
Journal article, 2009
Coincidences between charged particles emitted in the beta-decay of Li-11 were observed using highly segmented detectors. The breakup channels involving three particles were Studied in full kinematics allowing for the reconstruction of the excitation energy of the Be-11 states participating in the decay. In particular, the contribution of a previously unobserved state at 16.3 MeV in Be-11 has been identified selecting the alpha + He-7 -> alpha + He-6 + n channel. The angular correlations between the alpha particle and the center of mass of the He-6 + n system favors spin and parity assignment of 3/2(-) for this state as well as for the previously known state at 18 MeV. (C) 2009 Elsevier B.V. All rights reserved.
identification of new level in be-11
particles
x)]
measured beta-delayed he-4
gamma
emission
halo structure
charged particles coincidences
radioactivity li-11(beta(-)) [from ta(p
he-6 energy
spin and parity assignment
light-nuclei
radioactivity
energy-levels
partial decay branches
Author
M. Madurga
Spanish National Research Council (CSIC)
M. J. G. Borge
Spanish National Research Council (CSIC)
M. Alcorta
Spanish National Research Council (CSIC)
L.M. Fraile
Complutense University
H. O. U. Fynbo
Aarhus University
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
O. Kirsebom
Aarhus University
G. Martinez-Pinedo
Helmholtz
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
Göran Hugo Nyman
Chalmers, Applied Physics, Subatomic Physics
A. Perea
Spanish National Research Council (CSIC)
A. Poves
Universidad Autonoma de Madrid (UAM)
K. Riisager
Aarhus University
Olof Tengblad
Spanish National Research Council (CSIC)
Elisabeth Tengborn
Chalmers, Applied Physics, Subatomic Physics
J. Van der Walle
CERN
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 677 5 255-259Subject Categories (SSIF 2011)
Subatomic Physics
DOI
10.1016/j.physletb.2009.05.050