title: GdBr3: CE in a glass wafer as a nuclear radiation monitor.
abstract: A glass wafer that contains cerium-activated gadolinium-based scintillator has been tested as a nuclear radiation monitor. The detector is prepared by mixing powdered gadolinium and cerium (3+) bromides with alumina, silica, and lithium fluoride, melting the mixture at 1,400°C, and then quenching and annealing the glass. The resulting clear glass matrix emits stimulated blue light that can be collected by a conventional photomultiplier tube. Spectral analysis of radionuclides with this detector shows the energy peaks for alpha particles, the energy continuum for beta particles, the Compton continuum and full-energy peaks for gamma rays, and an energy continuum with specific reaction-product peaks for neutrons. Energy resolution for the 5.5-MeV alpha particle and 0.662-MeV gamma-ray peaks is about 20%. This resolution, although threefold poorer than for single-crystal NaI(Tl) scintillators, contributes to radionuclide identification and quantification. Application of this detector to radiation monitoring is proposed, as well as approaches for improving light collection and energy resolution that will facilitate radionuclide identification and monitoring, especially for alpha particles, beta particles, and low-energy gamma rays.
authors.affiliation: Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta GA 30332-0834, USA.
authors.forename: Zhitao
authors.initials: Z
authors.lastname: Kang
authors.forename: Robert
authors.initials: R
authors.lastname: Rosson
authors.forename: M Brooke
authors.initials: MB
authors.lastname: Barta
authors.forename: Jason
authors.initials: J
authors.lastname: Nadler
authors.forename: Brent
authors.initials: B
authors.lastname: Wagner
authors.forename: Bernd
authors.initials: B
authors.lastname: Kahn
mesh_terms: D000512:Alpha Particles; D000537:Aluminum Oxide / Q000737:chemistry; D001610:Beta Particles; D001965:Bromides / Q000737:chemistry*; D002563:Cerium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry; D005682:Gadolinium / Q000737:chemistry*; D005720:Gamma Rays; D005898:Glass / Q000737:chemistry*; D018020:Lithium Compounds / Q000737:chemistry; D009502:Neutrons; D011834:Radiation Monitoring; D012588:Scintillation Counting; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: D001965:Bromides; D018020:Lithium Compounds; C027651:lithium fluoride; D002563:Cerium; D012822:Silicon Dioxide; D005682:Gadolinium; D000537:Aluminum Oxide; D005459:Fluorides