RADIATION DETECTOR AND RADIATION DETECTING METHOD

摘要

A radiation detector 6 detects radiation that passed through a specimen 2 by discriminating it by a plurality of energy regions. The radiation detector 6 includes a radiation detecting section 10 which generates output signals corresponding to energy of the incident radiation, and a signal processing section 20 which discriminates output signals by first through N-th signal discrimination thresholds T 1 through T N and acquires regional counts A 1 through A N as radiation counts in the plurality of energy regions W 1 through W N by counting the discriminated output signals. The first through N-th signal discrimination thresholds T 1 through T N are set so that reference regional counts A 1(B) through A N(B) as regional counts in the plurality of energy regions W 1 through W N when the radiation detecting section 10 detects radiation (reference radiation) before passing through the specimen 2 become substantially equal.