Neutron capture cross sections of [sup 84,86]Kr and their impact on stellar nucleosynthesis

The Krypton isotopes lie in one of the most sensitive, complicated and, therefore, interesting region of the s-process nucleosynthesis. This mass region, in fact, receives substantial contribution from both the weak and the main component of the s-process. In addition to that, the branching in the s-process path at 85Kr can deliver important information on the neutron flux. The total cross section of 84Kr and the capture cross section of 86Kr have been measured and the MAC cross sections calculated with the aim to reduce the uncertainties in the s-process models due to nuclear parameters.