We report the result of a search in the Kamiokande II detector for the interactions of electron-type antineutrinos in the energy level 19 to 35 MeV. We measure directly a 90%-C.L. upper limit of 226 cm^-2 sec^-1 on the flux of electron antineutrinos with energies in that interval. An upper limit on the total flux of relic antineutrinos from past supernovae is obtained as a function of the effective equilibrium temperature of the relic antineutrino sea.
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Zhang et al. (1988) studied this question.
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