Abstract: A method and apparatus for providing temperature compensation in gamma radiation detectors used in measurement-while-drilling applications in oil and gas exploration. During the initial calibration of a gamma radiation detector, a source of radiation in the form of Americium 241 provides gamma radiation narrowly centered at 60 KeV. The variation in the output signal of the detector as a function of temperature is then determined by placing the detector in close proximity to the radiation source while monitoring the variation in the magnitude of the output pulses as a function of temperature. The detector includes a temperature compensation circuit that generates a threshold voltage whose magnitude corresponds to the desired threshold energy of gamma radiation. The temperature compensation circuit uses a temperature sensor to vary the magnitude of the threshold voltage as a function of the operating temperature of the detector.