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A hexagonal pilot-U scintillator of 6 cm side length, 27 cm2 surface area, 1 mm thickness and with two photomultipliers on opposite edges of the slab was investigated. For irradiation on a central spot of 0.6 cm2 by monoenergetic alpha particles, an energy resolution of 24% and a time resolution of 186 ps is obtained. For entire irradiation of the scintillator the energy resolution is 37%, and the time resolution amounts to 960 ps. Systematic irradiations on nine small spots across the entire surface area of the scintillator were made to determine the light attenuation, the pulse-height resolution and the time-delay versus location. A correction procedure was developed to take into account the spatial effects, thus reducing the energy and time resolution for whole area irradiation to 28% and 240 ps respectively. The procedure is applicable for polyenergetic sources since it relies on the measurement of pulse-height ratios.

Additional information

Authors: WATTECAMPS E, JRC Geel (BE);ROLLIN G, JRC Geel (BE);KETERS M, Industriele Hogeschool van het Rijk, Hasselt (BE)
Bibliographic Reference: Article: Nuclear Instruments and Methods in Physics Research A, Vol. 309 (1991) pp. 209-217
Record Number: 199210092 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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