Search

The LVD detector, located in the Gran Sasso Laboratory at a depth of 3600 m w.e., is designed for research in the field of neutrino physics, astrophysics, cosmic ray physics and the search for rare processes predicted by theory. The LVD experiment was built in 1991 to detect neutrinos from collapses of stellar nuclei in our galaxy. The background of the detector is atmospheric muons, neutrons generated by muons in the detector material and natural radioactivity underground. The report presents the latest experimental results obtained at LVD: a limit on the frequency of supernova outbreaks, muon variations with a period of 1, 4, 10 years, and also describes the problems of studying the low-energy background underground. [ABSTRACT FROM AUTHOR]

The analysis of atmospheric muons detected in the LVD underground experiment (Gran Sasso, Italy) has been completed. Atmospheric muons and the low-energy background that the LVD detects undergo annual (seasonal) variations. The background is created by gamma quanta from decays of Rn daughter nuclei. Variations are due to seasonal fluctuations in radon concentration and additional injection of radon from groundwater associated with tectonic activity. At the LVD, research is underway to identify the relationship between the behavior of radon fields and seismic activity. The paper will discuss various sources of variations associated with geophysical aspects (the influence of the moon's motion; changes in pressure, humidity and temperature; seismic activity). [ABSTRACT FROM AUTHOR]