Radiation detector having radiation source position detecting means

摘要

Disclosed is a radiation detector provided at both ends with radiation source position detecting means each including three to five electrode plates in which a bias electrode plate centrally disposed has cover layers on both surfaces, and signal electrode plates disposed on both sides of the bias electrode plate each have a cover layer on only one surface farther from the bias electrode plate. Material of the cover layer has a smaller secondary electron emissive power than that of the material of the electrode plates with respect to incident radiation.