Thallium bromide is a compound semiconductor attractive for fabrication of radiation detectors that operate at room temperature. It exhibits high photon stopping power due to its high atomic number (81 and 35) and high density (7.56 g/cm3). TlBr detectors exhibit excellent energy resolutions at room temperature (~1% FWHM for 662-keV gamma rays).

TlBr Detector Fabrication

High-pure TlBr crystals are obtained by the zone purification method.

Large TlBr crystals are grown by the Bridgman method from the purified material.

TlBr detectors are fabricated by evaporating electrodes on the TlBr wafers.

TlBr Crystals

Raytech Co.,LTD is the only manufacturer of semiconductor radiation detectors in Japan offering TlBr crystals. For more information, please visit Raytech’s web site.

TlBr Detector and Readout Module

A radiation measurement system manufacturer CLEAR-PULSE CO., LTD. has developed TlBr Detector and Readout Module. For more information, please visit CLEAR PULSE’s website.