The president of Acrorad, a company developing X-ray detectors based in Okinawa, has been working to replace the luminescing ceramic with a semiconductor called cadmium telluride (CdTe).

At the heart of the spectrometer is an arrangement of mercury cadmium telluride photodiodes cooled to minus 203 degrees Celsius ... light on the Cassini-Huygens spacecraft (studying Saturn and its ...