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Direct detection of relic neutrinos in a beta-decay experiment is anambitious goal, which has for a long time been beyond the reach of availabletechnology. One of the toughest practical difficulties that such an experimenthas to overcome is that it needs to deal with a large amount of radioactivematerial in such a way as to not compromise the energy resolution required forthe separation of useful events from the massive beta-decay background. ThePTOLEMY project offers an innovative approach to this problem based ondeposition of radioactive material on graphene. While such an approach isexpected to resolve the main difficulty, new challenges arise from theproximity of the beta decayers to a solid state system. In this work, we focuson the effect of the shakeup of the graphene electron system due to abeta-decay event. We calculate the distortion of the relic neutrino peaks asresulting from such a shakeup, analyse the impact of the distortion on thevisibility of neutrino capture events and discuss what technological solutionscould be used to improve the visibility of neutrino capture events.

Impact of the X ray edge singularity on detection of relic neutrinos in the PTOLEMY project