Speaker
Description
In our laboratory two low background gamma spectrometers with germanium
detectors are equipped with active shield. Such shield is a system of
five large plastic scintillatior detectors sensitive for muons
surrounding the massive cubic lead shield of spectrometer from five
sides. The active shield works in the anticoincidence mode with
germanium detector. In our spectrometers data is collected in the even
by event mode and the antioincidence logical function is performed
during of-line analyzes of time structure of data. The first
spectrometer operates from September 2018, the second one from January
2021. The Fourier analyse for initial results from 18 months revealed,
besides a day cycle two longer cycles close to one month and 70 days.
Further analyses are planned.
