Single crystals for radiation detectors

F centre production in CsI and CsI–Tl crystals under Kr ion irradiation at 15 K

“…Apparently it is well known that the introduction of minor concentration of mercury-like ions into alkali halides leads to a signi®cant increase of the yield of stable F centre under irradiation at 80 K [20] or 300 K [19,21]. This phenomenon is explained by the trapping of H centres by the activator ions giving a decrease of the portion of F centres recombining in non-correlated F±H pairs [1,22].…”

Synthesis and Luminescence Properties of EuMoO4 Octahedron-Like Microcrystals

“…Scheelite-type crystalline structures, such as metal molybdates, where molybdenum atoms are coordinated tetrahedrally, have recently attracted great attention because of their promising applications in the electrooptical field (Ryu et al, 2005,a;Gong et al, 2006). Recently, molybdates have been extensively studied due to its attractive luminescence behavior and interesting structural properties (Thongtem et al, 2010), which can be used in a number of fields, such as optic fibers (Ryu et al, 2005, b) laser host materials (Wang et al, 2007), luminescence materials (Zhang et al, 2005;Sen & Pramanik, 2001), efficient catalysts (Ishii et al, 1992), scintillation detectors (Marques et al, 2006), and microwave application . Among all these molybdates, EuMoO 4 is an important opto-electrical material based on its red and white LED phosphors (Rosa et al, 2009).…”

Energy Transfer, Fluorescence and Scintillation Processes in Cerium-Doped RE3+AlO3Fast Scintillators

“…Ce3+-doped RE3 +ΑlO3 orthoaluminnates are new types of crystal scintillators which are characterized by (i) high density (from 6 g/cm 3 to 8.5 g/cm3), (ii) high light yield exceeding that of Bi4 Ge3 O 12 (BGO) which is roughly 9000 photons/MeV [3] and (iii) fast fluorescence and scintillation decays (τ ≈ 10-30 ns) [3,6,11]. If the crystals have these properties together with mechanical and chemical stability then tley can be used in scintillator applications as e.g.…”

“…One of the most studied materials are either Ce3+-doped crystals [1,5,6] or Ce 3 +-concentrated ones as e.g. CeF 3 [8].…”

“…Recent applications of scintillators in medical imaging of human body (PET scanning, γ-cameras and X-ray tomographies) require improved or even quite new scintillatiug materials [1][2][3][4][5][6][7]. One of the most studied materials are either Ce3+-doped crystals [1,5,6] or Ce 3 +-concentrated ones as e.g.…”