| 摘要 |
A neutron detector sensitive principally to epithermal neutrons is disclosed. Ina preferred embodiment of the invention, a neuron counter is substantially surrounded by a reflector composed of material having a high neutron scattering cross section. The reflector is then wrapped in a shield which is composed of a thermal neutronabsorber. In a specific embodiment of the invention, the counter, reflector and shield aremounted inside a neutron moderator which can be composed of plastic.
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