Development of high resolution gamma-ray spectrometer for a rover mission on the Moon

Abstract

To investigate the major elemental composition of lunar and planetary surface, we are developing gamma-ray detector, which can be used in a rover on a planet. We utilize CdTe semiconductor detectors which have high detection efficiency for gamma-rays. To achieve the efficiency necessary for the observation, 1mm thick CdTe detectors are stacked. In this presentation, we show development status of CdTe detectors and simulation results about the stacked detector resonse to MeV gamma-rays.