Measurements of (alpha,n) cross-sections relevant for the r-process

The fast-expanding neutron-rich neutrino-driven winds in the core-collapse supernovae are favorable scenarios for the nucleosynthesis of the light-heavy elements. Charge particle reactions, especially ($\alpha$,n) create seeds for the weak r-process populating abundances of near stable isotopes for the Sr-Ag range, for which there remains a large discrepancy between observed and predicted elemental abundances in the metal-poor halo stars. These abundances are significantly sensitive to the ($\alpha$,n) reaction rates. Only very few of these reactions had been measured in the energy range relevant for weak r-process astrophysical conditions. Theoretical calculations of reaction rates for such scenarios are very uncertain and model-dependent. In this talk, I will discuss measurements of $^{85}$Br,$^{75}$Ga, and $^{85}$Rb ($\alpha$,n) cross-sections using the HabaNERO detector at ReA3, NSCL along with future possibilities to measure and constrain other important ($\alpha$,n) reactions relevant for the r-process.