Recent developments in BaF2 scintillator coupled to a low-pressure wire chamber

Abstract

A mode of operation is discussed for a detector using BaF₂ as the scintillator, and tetrakis(dimethylamine)ethylene (TMAE) as the photosensitive agent adsorbed on a NiCr layer to form a photocathode. The position resolution of the detector with a crystal 25 mm thick and 120 mm in diameter is measured to be about 3 mm fwhm. The physics of TMAE as a liquid is also discussed.