Helium capture reactions are taking place during various phases of stellar evolution, from the Helium burning phase of a star to the alpha-process during the thermonuclear runaway of an X-ray burst. In some environments, (α,n) reactions provide the neutrons needed for the s-process. The vanishingly small cross section of those reactions at relevant energies may be influenced by the presence of resonances close to, or below, the threshold.
In this talk, a variety of experimental methods used for the investigation of Helium capture will be discussed. Direct and indirect studies will be presented along with technical developments for future studies.
Argonne Physics Division Seminar Schedule