The branching ratio of the electron-capture decay of Krm81 (13 s) has been measured in order to obtain the rate of the neutrino capture reaction Br81(,re-)81Kr(190.6 keV). This quantity is needed to determine the properties of an Br81 solar neutrino detector. A branching ratio of (3.140.58)×10-5 was obtained, leading to a logft of 5.10-0.07+0.06 for this transition
