Beta decay of fission products is at the origin of decay heat and antineutrinoemission in nuclear reactors. Decay heat represents about 7% of the reactor power duringoperation and strongly impacts reactor safety. Reactor antineutrino detection is usedin several fundamental neutrino physics experiments and it can also be used for reactormonitoring and non-proliferation purposes. 92,93Rb are two fission products of importancein reactor antineutrino spectra and decay heat, but their β-decay properties are not wellknown. New measurements of 92,93Rb β-decay properties have been performed at theIGISOL facility (Jyväskylä, Finland) using Total Absorption Spectroscopy (TAS). TASis complementary to techniques based on Germanium detectors. It implies the use of acalorimeter to measure the total gamma intensity de-exciting each level in the daughternucleus providing a direct measurement of the beta feeding. In these proceedings wepresent preliminary results for 93Rb, our measured beta feedings for 92Rb and we showthe impact of these results on reactor antineutrino spectra and decay heat calculations.
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