Conveners
13 Experiments in nuclear astrophysics III
- Björn Jonson (Chalmers U of Technology)
Anton Wallner
(Institut für Isotopenforschung und Kernphysik, VERA, Univ. Wien)
29/06/2006, 14:30
Experiments in nuclear astrophysics
Oral contribution
Accurate and precise cross-section data are the key ingredients to our understanding
of stellar nucleosynthesis. Common techniques for these data comprise online
time-of-flight measurements of reaction cross sections as well as offline methods
like the activation technique. In cases of longer-lived nuclides or nuclides with an
unfavourable decay scheme, counting atoms directly rather than...
Hidetoshi Yamaguchi
(CNS, Univ. of Tokyo)
29/06/2006, 14:50
Experiments in nuclear astrophysics
Oral contribution
We have studied the proton resonance scattering of 7Be
by using a pure 7Be beam produced at CRIB (CNS Radioactive Ion Beam
separator; CNS stands for Center of Nuclear Study, University of Tokyo).
The excitation function of 8B was measured up to the excitation
energy of 6.8 MeV, using the thick-target method.
The excited states of 8B higher than 3.5 MeV were not known
by the past...
Clarisse Tur
(Michigan State University / NSCL)
29/06/2006, 15:10
Experiments in nuclear astrophysics
Oral contribution
The rate of the triple alpha process, which plays a central role in the production of
12C in stars, is known with an accuracy of about 12%. Variations within the +/-12%
errors can cause significant changes in the determination of the mass of the iron
core in core-collapse supernovae (type II) and the composition of the material later
ejected in the interstellar medium, as well as a factor...
Alexander Herlert
(European Organization for Nuclear Research (CERN))
29/06/2006, 15:30
Nuclei far from stability
Oral contribution
The nuclear mass is an important parameter in nuclear physics and astrophysics. The
experimental determination of precise and accurate values is a challenge, especially
for short-lived radionuclides far away from the valley of stability with low
production yields as well as half-lives down to the millisecond time scale. However,
these mass values are required for testing and modelling...
Sotirios Harissopulos
(Institute of Nuclear Physics, NCSR "Demokritos")
29/06/2006, 15:50
Experiments in nuclear astrophysics
Oral contribution
The p process is the production mechanism for a certain number of proton-rich,
stable nuclei, that cannot be produced by neutron captures. These 35 nuclei,
lying between Se and Hg, are referred to as p nuclei. The most favoured scenarios
for the p process involve the photodisintegration of intermediate and heavy
elements at high temperatures (2-3 billion degrees Kelvin) that can be...
