Geiger Muller Tube Replacement

Spectral Labs Geiger-Müller Tube Replacement (GMTR) concept exploits small, low-cost scintillators for a gross gamma counting sensor. Since GMTR will require less production processing steps compared to GMTs, GMTR devices will be cost competitive to equivalent sensitivity compensated GMTs in full scale production. The small crystal sizes projected result in partial deposition of photon energy in the crystal requiring external means to compensate for low energy gamma. A Phase I objective was to establish these external compensation parameters to ensure dose rate linearity across a broad range of gamma photon energies by numerical modeling followed by building and testing of prototypes.