Lunar-Monthly Variances in the Background Gamma-Quanta Measured at the LVD

ording to the Large Volume Detector (LVD), located in the underground laboratory of Gran Sasso, Italy, a modulation of the concentration of the radioactive gas radon from the natural radioactivity of the rock, associated with lunar-monthly cycles, was detected. The rising phase falls on the days of the full moon. The amplitude of variations varies from 0.5 to 0.8 % .