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Fig. 29


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CHICADE's graphite neutron measurement cell for 200 L drums SYMETRIC, including 99 3He proportional counters with charge preamplifiers connected to an electronics counting coincidences between spontaneous fission neutrons (passive mode) or prompt and delayed fission neutrons induced by the use of a 2 · 109 n.s−1 high flux neutron generator (active neutron interrogation).

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