Title :
Study of energy response of Gd2SiO5:Ce3+ scintillator for the ASTRO-E hard X-ray detector
Author :
Uchiyama, Yusuke ; Kouda, M. ; Tanihata, C. ; Takahashi, T. ; Murakami, Toshiyuki ; Tashiro, T. ; Makishima, K. ; Fukazawa, Y. ; Kamae, T.
Author_Institution :
Inst. of Space & Astron. Sci., Kanagawa, Japan
Abstract :
The energy dependencies of the response of crystalline oxide scintillator Gd2SiO5:Ce3+ (GSO:Ce) are studied in the energy range from 14 to 662 keV as a part of the preflight calibration of the hard X-ray detector (HXD) onboard the ASTRO-E satellite. Around the energy of the gadolinium K-edge (50.2 keV) there exists non-proportionality and discontinuity in the relation between photon energy deposited and light yields. These characteristics are seen in all 16 GSO scintillator units of the HXD flight model. In order to evaluate the response quantitatively, we measure the “electron response” by means of the Compton coincidence technique
Keywords :
X-ray astronomy; X-ray detection; artificial satellites; astronomical telescopes; calibration; coincidence techniques; solid scintillation detectors; 14 to 662 keV; ASTRO-E hard X-ray detector; ASTRO-E satellite; Compton coincidence technique; Gd2SiO5:Ce; Gd2SiO5:Ce3+ scintillator; discontinuity; electron response; energy dependencies; energy response; light yields; nonproportionality; preflight calibration; Crystallization; Electrons; Energy measurement; Extraterrestrial measurements; Light scattering; Particle scattering; Photonic crystals; Radiation detectors; Satellites; X-ray detectors;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949193
