Growth of Y2O3, Sc2O3 and Lu2O3 crystals by the micro-pulling-down method and their optical and scintillation characteristics

✍ Scribed by Akihiro Fukabori; Valery Chani; Kei Kamada; Takayuki Yanagida; Yuui Yokota; Federico Moretti; Noriaki Kawaguchi; Akira Yoshikawa

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 781 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.10.211

✦ Synopsis

The growth of Y 2 O 3 , Sc 2 O 3 , and Lu 2 O 3 single crystals using the micro-pulling-down method is reported. Crystallinity, optical transmittance, and scintillation characteristics including emission spectra, pulse height spectra, and decay kinetics under a-ray excitation of the grown crystals were studied. The light yields of Y 2 O 3 , Sc 2 O 3 , and Lu 2 O 3 crystals were estimated from the pulse height spectra excited by 241 Am 5.5 MeV a-rays, in about 920 792 ph/5.5 MeVa, 370 7 37 ph/5.5 MeVa, and 150 715 ph/5.5 MeVa, respectively. The scintillation decay times of Y 2 O 3 , Sc 2 O 3 , and Lu 2 O 3 crystals were estimated with following fast/slow parameters 30.1/184, 14.6/51.3, and 16.7 ns, respectively. Furthermore, a-ray imaging was performed using Y 2 O 3 crystal.