Monocrystals of silicates of lanthanides usable as scintillators for the detection of X and gamma radiation

US4988882A · kind A · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Bernard Francois · Strasbourg, FR
• Monique Navizet · Saint-Égrève, FR
• Jean-Claude Rebreyend · Le Pont-de-Claix, FR
• Christophe Wyon · Yssingeaux, FR

Key dates

• Filing date: Jun 21, 1989
• Grant date: Jan 29, 1991
• Expiry date: Jun 21, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G21K4/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to monocrystals of silicates of lanthanides usable as scintillators for the detection of X and/or gamma radiation. The lanthanide silicate complies with formula: EQU (Ln.sub.1-x.sbsb.1.sub.-x.sbsb.2.sub.-x.sbsb.3 Ln'.sub.x.sbsb.1 Ce.sub.x.sbsb.2 Tb.sub.x.sbsb.3).sub.9.33 (SiO.sub.4).sub.6 O.sub.2 in which Ln and Ln', which differ, represent a rare earth element chosen from among La, Gd, Yb and Lu and x.sub.1, x.sub.2 and x.sub.3 are such that EQU 0.ltoreq.x.sub.1 <1 EQU 0.ltoreq.x.sub.2 .ltoreq.0.05 EQU 0.ltoreq.x.sub.3 .ltoreq.0.05 EQU 0<x.sub.2 +x.sub.3 .ltoreq.0.1 EQU 0<x.sub.1 +x.sub.2 +x.sub.3 <1