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Apparatus for characterizing fissile material, comprising a neutron radiation detector embedded in the interior of a gamma radiation detecting scintillator
Apparatus for characterizing fissile material, comprising a neutron radiation detector embedded in the interior of a gamma radiation detecting scintillator
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机译：用于表征易裂变材料的设备，包括嵌入在伽马射线探测闪烁体内部的中子射线探测器
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摘要
The apparatus consists of a vessel and a source (29) which emits neutrons for the bombardment of the fissile material. A system (28, 30) is provided to introduce the source (29) inside the vessel and to withdraw it from the vessel. A neutron radiation detector (9) is also provided. Moderators (2, 4, 6) for thermalizing the fission radiation emitted by the fissile material are placed between the neutron radiation detector (9) and the fissile material. The apparatus also includes a system (6, 14) for detecting gamma rays, consisting of a scintillator (6) and at least one photomultiplier (14) associated with the scintillator (6). The scintillator material also forms the moderator for thermalizing the fast neutrons emitted directly by the source (29), as well as the neutrons coming from spontaneous ( alpha , n) fission reactions and the neutrons coming from fission induced in the fissile material. The neutron radiation detectors (9) are embedded in the scintillator material (6) forming the moderator. …IMAGE…
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