RADIATION DETECTION ELEMENT, RADIATION DETECTOR PROVIDED WITH SAME, NUCLEAR MEDICINE DIAGNOSIS DEVICE AND METHOD FOR PRODUCING RADIATION DETECTION ELEMENT

摘要

This radiation detection element (1) is provided with: a crystal part (10) that is formed from a mixed ion-electron conductor, which is a compound wherein thallium ions are bonded with bromine ions; a metal electrode (13a) that is formed on one surface of the crystal part (10); and a metal electrode (13b) that is formed on a surface which is on the reverse side of the surface where the metal electrode (13a) is formed. The crystal part (10) has metal-containing parts (12) in the surfaces where the metal electrodes (13a, 13b) are respectively formed, said metal-containing parts (12) containing thallium that is obtained by selectively removing elemental bromine and neutralizing thallium ions. Consequently, there are provided: a practical radiation detection element which is suppressed in the occurrence of problems caused by polarization; and a method for producing this radiation detection element.