Measurement of X-ray spectra using a Lu2(SiO4)O-multipixel-photon detector with changes in the pixel number.
Appl Radiat Isot
; 103: 25-30, 2015 Sep.
Article
em En
| MEDLINE
| ID: mdl-26046520
ABSTRACT
To measure X-ray spectra with high count rates, we developed a detector consisting of a Lu2(SiO4)O [LSO] crystal with a decay time of 40 ns and a multipixel photon counter (MPPC). The photocurrents flowing through the MPPC are converted into voltages and amplified by a high-speed current-voltage amplifier, and event pulses from the amplifier are sent to a multichannel analyzer to measure spectra. We used three MPPCs of 100, 400 and 1600 pixels/mm(2), and the MPPCs were driven under pre-Geiger mode at a temperature of 20 °C. At a tube voltage of 100 kV and a tube current of 5.0 µA, the maximum count rate was 12.8 kilo-counts per second. The event-pulse widths were 200 ns, and the energy resolution was 53% at 59.5 keV using a 100-pixel MPPC.
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Assunto principal:
Fotometria
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Radiometria
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Raios X
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Processamento de Sinais Assistido por Computador
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Amplificadores Eletrônicos
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Lutécio
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article