Abstract: A semiconductor 2D position detector for two-dimensionally detecting positions of radiation is a Schottky diode comprising: a semiconductor substrate 2; a first to an nth (n is an integer of 2 or higher) stripe electrodes 3 arranged on the surface 2A of the semiconductor substrate 2 at given intervals in the X direction and in parallel to the Y direction; and an electrode 15 formed on the rear surface 2B of the semiconductor substrate 2. The top and the bottom ends of each of the stripe electrodes 3 are sequentially connected via a resistor 4, 5, and signals V1 to V4 output from the radiation 16 applied to the semiconductor substrate 2 are obtained from each of the both ends of the first and the nth stripe electrodes placed far left and right.

Abstract: A semiconductor 2D position detector for two-dimensionally detecting positions of radiation is a Schottky diode comprising: a semiconductor substrate 2; a first to an nth (n is an integer of 2 or higher) stripe electrodes 3 arranged on the surface 2A of the semiconductor substrate 2 at given intervals in the X direction and in parallel to the Y direction; and an electrode 15 formed on the rear surface 2B of the semiconductor substrate 2. The top and the bottom ends of each of the stripe electrodes 3 are sequentially connected via a resistor 4, 5, and signals V1 to V4 output from the radiation 16 applied to the semiconductor substrate 2 are obtained from each of the both ends of the first and the nth stripe electrodes placed far left and right.

Abstract: A disclosed semiconductor detector block includes a plurality of semiconductor plates each configured to have a front surface on which an electrically resistive electrode is formed and a back surface on which an electrically conductive electrode is formed and to detect a two-dimensional detection position of gamma rays on the semiconductor plates using a ratio of electric signals from four corners of the electrically resistive electrode, wherein the plurality of semiconductor plates are piled up and a three-dimensional detection position of the gamma rays is detectable using a ratio of the electric signals from the four corners of the electrically resistive electrodes.