Speaker
C. Matei
(Ohio University, Athens, OH)
Description
The cascade through the 6.049-MeV J(pi)=0+ state 16O of has rarely been discussed as
contributing to the 12C(a,g)16O cross section at low energies largely due to
experimental difficulties in observing this transition. We report here first
measurements of this transition in 12C(a,g)16O using the DRAGON recoil separator
facility at TRIUMF. The experiment was performed in inverse kinematics with an
incident 12C beam on a windowless 4He gas target, covering center of mass energies
between 2.2 MeV and 5.42 MeV. The coincidence setup included a BGO array around the
gas target and a DSSS Detector for the detection of 16O recoil particles at the
focal plane of DRAGON. To derive actual cross sections, the acceptance of DRAGON
including the BGO array has been simulated in GEANT.
The transition strength has been derived and analyzed in the R-matrix formalism.
Information on the 6.92-MeV cascade transition and the ground state transition were
also obtained from the same data set. We derived the 12C(a,g)16O total cross section
and found it in good agreement with a recently reported measurement
Author
C. Matei
(Ohio University, Athens, OH)
Co-authors
A. A. Chen
(McMaster University, Hamilton, Ontario, Canada)
C. R. Brune
(Ohio University, Athens, OH)
C. Ruiz
(Simon Fraser University, Burnaby, British Columbia, Canada)
C. Vockenhuber
(Simon Fraser University, Burnaby, British Columbia, Canada)
C. Wrede
(Simon Fraser University, Burnaby, British Columbia, Canada)
D. A. Hutcheon
(TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3)
D. Ottewell
(TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3)
G. Ruprecht
(TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3)
J. D'Auria
(Simon Fraser University, Burnaby, British Columbia, Canada)
J. Pearson
(McMaster University, Hamilton, Ontario, Canada)
L. Buchmann
(TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3)
M. Lamey
(Simon Fraser University, Burnaby, British Columbia, Canada)
M. Trinczek
(Simon Fraser University, Burnaby, British Columbia, Canada)
WP. Liu
(China Institute of Atomic Energy, Beijing, P. R. China)
WR. Hannes
(University of Konstanz, Department of Physics, Germany)
ZH. Li
(TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3)
