Patent ID: 8927939
Filing Date: 2015-01-06
Classification: G01T

Abstract:
1. A radiation measurement apparatus comprising: a radiation detector of a semiconductor crystal for detecting gamma rays; a power supply for applying a bias voltage to the radiation detector; a pre-amplification circuit for amplifying a pulse signal from the radiation detector; a couple of waveform shaping circuits having time constants different from each other, each of the couple of waveform shaping circuits configured to shape a waveform of an output signal from the pre-amplification circuit; and a computing unit that obtains an energy value of the gamma rays by processing output signals from the couple of waveform shaping circuits using a difference between a couple of pulse height values of the output signals from the couple of waveform shaping circuits so as to correct pulse height values outputted from one of the couple of waveform shaping circuits, wherein the computing processing uses the difference between the couple of pulse height values of the output signals from the couple of waveform shaping circuits and an inverse of the wave height value of one of the couple of waveform shaping circuits whose time constant is shorter than that of the other.