A double gap Bakelite Resistive Plate Chamber (RPC) with common readout has been exposed to the radiation emitted from a 252 Cf source to measure its neutron and γ sensitivity. RPC signals were triggered by fission events detected using BaF 2 scintillators. A GEANT 3.21 Monte Carlo code with MICAP interface estimated the γ and neutron contributions to the total number of collected RPC signals. A neutron sensitivity s n = 0.46 × 10 −3 at ≈ 2 MeV and a γ sensitivity s γ = 12.6 × 10 −3 at ≈ 1.5 MeV have been measured for the double gap configuration.

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