Radiation detector, radiation measuring apparatus, and method for setting radiation detector
A radiation detector that suppress a double count which occurs by detecting a single pulse duplicately with a plurality of counters in counter switching, and can acquire highly accurate data, is configured to detect radiation in continuous exposure, comprises a sensor for generating a pulse when a particle of radiation is detected, a plurality of counters provided for counting the pulses, a setting holding circuit for holding a setting of an off-time for turning off any of the plurality of counters, and a control circuit for switching the counter performing counting the pulses after a lapse of the off-time with respect to a trigger signal.
1 . A radiation detector detecting radiation in continuous exposure, comprising:
a plurality of pixels arranged in a one-dimensional or two-dimensional array, each of the pixels including a sensor for generating a pulse in response to a particle of radiation being detected and a plurality of counters provided for counting the pulses,
a setting holding circuit for holding a setting of an off-time for turning off all of the plurality of counters in all the pixels, and
a control circuit for switching the counter performing counting the pulses after a lapse of the off-time for all of the plurality of counters in all the pixels with respect to a trigger signal.
2 . The radiation detector according to claim 1 , wherein the off-time is a time constant.
3 . The radiation detector according to claim 1 ,
wherein the number of detected photons relative to the number of incident photons is plotted on a theoretical curve determined based on the radiation source.
4 . The radiation detector according to claim 1 , wherein the radiation detector is a one-dimensional or two-dimensional detector.
5 . A radiation measuring apparatus capable of measuring radiation in continuous exposure, comprising:
a radiation source for continuously irradiating radiation,
a sample holder for holding a sample, and
the radiation detector according to claim 1 .
6 . The radiation measuring apparatus of claim 5 , wherein the off-time is a time constant.
7 . A method of setting a radiation detector for detecting radiation in continuous exposure, the radiation detector comprising a plurality of pixels arranged in a one-dimensional or two-dimensional array, each of the pixels comprising a sensor for generating a pulse in response to a particle of radiation being detected and a plurality of counters provided for counting the pulses, comprising steps of:
receiving an input for setting an off-time for turning off all of the counters in all the pixels comprised in the radiation detector, and
causing the radiation detector to hold the input setting.