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Titolo:
CHARACTERIZATION OF FLUOR CONCENTRATION AND GEOMETRY IN ORGANIC SCINTILLATORS FOR IN-SITU BETA-IMAGING
Autore:
TORNAI MP; HOFFMAN EJ; MACDONALD LR; LEVIN CS;
Indirizzi:
UNIV CALIF LOS ANGELES,SCH MED,DEPT MOL & MED PHARMACOL,DIV NUCL MED & BIOPHYS LOS ANGELES CA 90095 UNIV CALIF LOS ANGELES,DEPT PHYS LOS ANGELES CA 90095
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 6, volume: 43, anno: 1996,
parte:, 2
pagine: 3342 - 3347
SICI:
0018-9499(1996)43:6<3342:COFCAG>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
M.P. Tornai et al., "CHARACTERIZATION OF FLUOR CONCENTRATION AND GEOMETRY IN ORGANIC SCINTILLATORS FOR IN-SITU BETA-IMAGING", IEEE transactions on nuclear science, 43(6), 1996, pp. 3342-3347

Abstract

Development of a small area (1-2 cm(2)) in situ beta imaging device includes optimization of the front end scintillation detector, which isfiber optically coupled to a remote photon detector, Thin plastic scintillation detectors, which are sensitive to charged particles, are the ideal detectors due to the low sensitivity to ambient gamma backgrounds, The light output of a new binary plastic scintillator was investigated with respect to increasing concentrations of the fluor (0.5-2.0%by weight) and varying thickness cylindrical configurations of the intended imaging detector, The fluor had an emission maximum increasing from 431 to 436 mn with increasing fluor concentration, The decay time(s) had two components (0.38 and 1.74 ns), There was an similar to 20%increase in light output with increasing fluor concentration, measured with both (TI)-T-204 betas and conversion electrons from Bi-207, Thehighest light output of this new scintillator was measured to be similar to 30% lower than BC404. Simulations predicted the 1.5 mm scintillator thickness at which light output and energy absorption for similarto 700 keV electrons (e,g,, from Tl-204, F-18) were maximized, which corresponded with measurements, As beta continua are relatively featureless, energy calibration for the thin scintillators was investigated using Landau distributions, which appear as distinct peaks in the spectra, As the scintillators were made thinner, gamma backgrounds were shown to linearly decrease.

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Documento generato il 29/03/20 alle ore 13:59:01