 |
Master
en Física Nuclear y de Partículas y sus aplicaciones
Astrofísica
Nuclear |
curso
2014/2015 |
Topic 10: Constraining nova observables: Direct measurements of resonance strengths in 33S(p,γ )34Cl
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The 33 S(p,γ )34 Cl reaction is important for constraining predictions
of certain isotopic abundances in oxygen-neon novae. Models currently
predict as much as 150 times the solar abundance of 33 S in oxygen-neon
nova ejecta. This overproduction factor may vary by orders of
magnitude due to uncertainties in the 33 S(p,γ )34 Cl reaction rate at
nova peak temperatures. Depending on this rate, 33 S could potentially
be
used as a diagnostic tool for classifying certain types of presolar
grains. Better knowledge of the 33 S(p,γ )34 Cl rate would also aid in
interpreting nova observations over the S-Ca mass region and contribute
to the firm establishment of the maximum endpoint of nova
nucleosynthesis. Additionally, the total S elemental abundance which is
affected by this reaction has been proposed as a thermometer to study
the peak temperatures of novae
Guideline
1.
Motivation: stelar scenarios, role of the reaction in stellar nucleosynthesis, previous attemps to investigate this reaction.
2. Description of the experiment: accelerator, experimental setup.
3. Discussion of the results and implications in observed abundances.
Bibliography
- J. Fallis et al., Phys. Rev. C 88, 045801 (2013)