Crystal growth and characterization of calcium metaborate scintillators

0424358 - FZÚ 2014 RIV NL eng J - Článek v odborném periodiku
Fujimoto, Y. - Yanagida, T. - Kawaguchi, N. - Fukuda, K. - Totsuka, D. - Watanabe, K. - Yamazaki, A. - Chani, V. - Nikl, Martin - Yoshikawa, A.
Crystal growth and characterization of calcium metaborate scintillators.
Nuclear Instruments & Methods in Physics Research Section A. Roč. 703, MAR (2013), s. 7-10. ISSN 0168-9002. E-ISSN 1872-9576
Institucionální podpora: RVO:68378271
Klíčová slova: Czochralski method * single crystal * scintillator * calcium metaborate * luminescence
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.316, rok: 2013

Calcium metaborate CaB2O4 single crystals were grown by the Czochralski(CZ)method with the radio-frequency(RF) heating system.In these crystals,a plane cleavage was observed along the growth direction. The crystals had an 80% transparency, and no absorption bands were detected in the 190–900 nm wavelength range. The 241Am 5.5MeV alpha-ray-excited radioluminescence spectrum of CaB2O4 demonstrated a broad intrinsic luminescence peak at 300–400nm, which originated from the lattice defects or an exciton-based emission. According to the pulse height spectrum, when irradiated by neutrons from a 252Cf source, the scintillation light yielded approximately 3200 photons per neutron.
Trvalý link: http://hdl.handle.net/11104/0230427