Attempt at the Change of Decay Rate of Gold-198 by Using Weak-Interaction Field in Electrochemical Neutrino Detector

An electrochemical apparatus was developed in our group for detecting neutrinos. The electrochemical detector was considered to make use of a biological product as an origin of weak-interaction through an axial-vector type scalar auxiliary field. The detector successfully responded to neutrinos. Some radioisotopes make beta decay to disintegrate into stable nuclei by weak-interaction. It is interesting to place a radioisotope sample inside the electrochemical detector and to observe whether the decay rate is influenced or not. As the radioisotope, activated gold of gold-198 was selected in this study. Gamma rays were measured by a germanium detector for an activated gold sample as reference data, while they were done for another activated gold sample which was placed in the electrochemical neutrino detector. The experiments were carried out with two detectors. The change of the half-life was unclear for these data. For evaluating the periodical variation of the beta decay rate, the measured counts were processed by Fast Fourier Transformation. A result showed that the component with periodicity of 6 hours gave statistically meaningful deviation (99% confidence) from the case of Poisson distribution. Further experiments may be required for studying reproduction of experimental results.