Recent new measurements of low energy cross sections
for reactions in stellar hydrogen and helium burning demonstrated
that large uncertainties exist about the reaction rates at stellar
temperatures. New measurements rely on efficient background reduction
in underground laboratories or on active background reduction
through sophisticated detector arrays and particle identification
techniques. Despite substantial innovations in experimental techniques,
the extrapolation of the experimental data still relies on nuclear
reaction theory. R-matrix theory has re-emerged as one of the
most powerful tools for reaction cross section calculation and
extrapolation. For this particular kind of R-matrix application,
resonant and nonresonant contributions need to be considered,
often in a multi-level and multi-channel configuration take
all reaction components into account. Dick Azuma has contributed
greatly to the experimental study of proton and alpha capture
reactions for more than five decades, over the last few years
he contributed enormously to the interpretation and extrapolation
of data using R-matrix theory and introducing these techniques
to a new generation of young nuclear astrophysicists.
Dick Azuma is one of the great pioneers in nuclear physics.
He has contributed to many sub-disciplines of the field,
from in-beam gamma spectroscopy, to weak interaction and beta and
beta-delayed decay experiments, to radioactive beam experiments to
medium energy proton scattering studies, working at the University
of Toronto, Chalk River, CERN/ISOLDE, and TRIUMF. We want to honor
his contributions and dedication to Nuclear Astrophysics, his
studies of radiative capture reactions for the CNO cycles and
his studies of alpha capture reactions such as 12C(a,g)16O, the
key reaction of stellar helium burning are milestones for our
understanding of stellar burning processes.
On the occasion of his 78th birthday we would like to honor
him and his achievements by organizing this special workshop on
"R-matrix in Stellar Hydrogen and Helium Burning". In light of
this special occasion we have invited a number of speakers to review
historical development and present the latest experimental
and theoretical results on low energy proton and alpha capture
reactions for the CNO cycles in main sequence stars and stellar
helium burning.
The meeting will take place on April
21 - 23, 2008 at the La Fonda hotel in Santa Fe, New Mexico (Address: 100 East San Francisco Street, Santa Fe, NM 87501).
We would like to invite you to participate in this workshop. A
number of rooms has been reserved at the La Fonda. The deadline
for registration is March 1, 2008. This meeting
is organized and sponsored by the Joint
Institute for Nuclear Astrophysics (JINA), Los
Alamos National Laboratory, and TRIUMF.
Registration
|| Download
Poster || Program || Talks || Photos
