Abstract
Direct measurements of nuclear reactions of astrophysical interest can be challenging. Alternative experimental techniques such as transfer reactions and inelastic scattering reactions offer the possibility to study these reactions by using stable beams. In this context, I will present recent results that were obtained in Orsay using indirect techniques. The examples will concern various astrophysical sites, from the Big-Bang nucleo synthesis to the production of radioisotopes in massive stars.
Highlights
The effect of these resonances may change the extrapolated S-factor by a huge factor
Direct measurements of nuclear reactions of astrophysical interest can be challenging. Alternative experimental techniques such as transfer reactions and inelastic scattering reactions offer the possibility to study these reactions by using stable beams
The other problem with direct measurements is related to the radioactive nature of the nuclei involved in reactions occurring for instance in novae, r-process
Summary
The effect of these resonances may change the extrapolated S-factor by a huge factor. To bypass all these difficulties, related to extrapolation and/or radioactive nuclei, indirect techniques such as transfer reactions, ANC, inelastic scattering and charge exchange-reactions may help to determine the most important ingredients to evaluate the cross section and reaction rates of resonant reactions: the energy level, spin-parity and partial decay widths of the state of interest in the formed compound nucleus.
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