Speaker
Description
After more than five decades of experimental effort the rate of 𝛼 on 12C radiative capture at astrophysical energies (𝐸𝑐𝑚 ~ 0.3 MeV above threshold) is not determined with desired precision and it is a cause of the largest uncertainty contribution in modeling of evolution of massive stars and underlying nucleosynthesis. By using the windowless gas jet target and modern energy-recovery linear accelerators (ERLs, CBETA at Cornell, NY, USA and MESA in Mainz, Germany) to reach high luminosity, a high precision measurement of the electron scattering on 16O nucleus would provide a method to determine the rate of the 𝛼 on 12C radiative capture for energy range 𝐸𝑐𝑚 < 2 MeV with a superb precision compared to previous experiments [1]. The feasibility of this method still needs to be studied. This could be done in a moderate luminosity experiment at existing electron accelerator sites by measuring the rate at 𝐸𝑐𝑚 > 2 MeV where the cross section is much larger.
[1] I. Friščić, T. W. Donnelly, and R. G. Milner, Phys. Rev. C 100, (2019) 025804
Currently supported by:
Croatian Science Foundation under the project IP-2018-01-8570 and European Union’s Horizon 2020 research and innovation program under the grant agreement 101038099.
