The possible use of a Spherical Proportional Counter for the search neutrinoless double beta decay is investigated in R2D2 R&D project. Dual charge and scintillation light readout may improve detector performance. Tests were carried out with pure argon at 1.1 bar using 6x6 mm2 silicon photomultiplier. Scintillation was used first time to trigger spherical proportional counter. measured drift ex...

Pacific Northwest National Laboratory has recently opened a shallow underground laboratory intended for measurement of low-concentration levels of radioactive isotopes in samples collected from the environment. The development of a low-background liquid scintillation counter is currently underway to further augment the measurement capabilities within this underground laboratory. Liquid scintill...

The indoor 222Rn radionuclide was directly absorbed in typical 20 ml glass scintillation vials by passing -3 dm3 of ambient air through 16 ml of water-immiscible non-volataile scintillation cocktail Ultima-Gold F for 10 min. The activity of radon and its two α-emitting daughters: 218Po and 214Po, was determined with the BetaScout low-background liquid scintillation counter. The limit of 222Rn d...