TheQEC dependence of evidence for a 17-keV neutrino from the55Fe radiative decay
The internal bremsstrahlung spectrum of55Fe was studied using HPGe detector in low background and reduced pileup conditions. The data show that the conclusion on the presence of a heavy mass neutrino strongly depends from the experimental decay energy value taken in the analysis. The decay energy was found to beQEC=231.37 ± 0.10 keV. The obtained results also show the need for the higher accuracyQEC used in the analysis of the existence of a 17-keV neutrino in the55Fe decay.