Temperature Characteristics of the Radiation Detector Using the T1Br Crystals

The radiation detector was fabricated from the T1Br crystals grown by TMZ (travelling molten zone) method and the FWHM and transit time of electrons and holes were measured as a function of temperature. The T1Br radiation detector shows the best response characteristics at about 313 K (3.19[K.sup.-1]) in cases where holes mainly contributed to the output pulses. However, in the temperatures higher than 300 K (3.33 [K.sup.-1]), the FWHM for [sup.241]Am [Alpha]-particles (5.48 MeV) becomes worse. An activation energy of about 0.90eV has been deduced from the resistivity measurement.