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Thermal neutron detection using a silicon pad detector and 6LiF removable converters

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12 Author(s)
Barbagallo, Massimo ; Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy ; Cosentino, Luigi ; Forcina, Vittorio ; Marchetta, Carmelo
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A semiconductor detector coupled with a neutron converter is a good candidate for neutron detection, especially for its compactness and reliability if compared with other devices, such as 3He tubes, even though its intrinsic efficiency is rather lower. In this paper we show a neutron detector design consisting of a 3 cm × 3 cm silicon pad detector coupled with one or two external 6LiF layers, enriched in 6Li at 95%, placed in contact with the Si active surfaces. This prototype, first characterized and tested at INFN Laboratori Nazionali del Sud and then at JRC Ispra, was successfully shown to detect thermal neutrons with the expected efficiency and an outstanding gamma rejection capability.

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Review of Scientific Instruments  (Volume:84 ,  Issue: 3 )