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Temperature dependence of $$gamma$$-ray and neutron sensitivities of nuclear emulsion with AgBr nano-grains

Ishihara, Kohei*; Kawarabayashi, Jun*; Tomita, Hideki*; Naka, Tatsuhiro*; Asada, Takashi*; Morishima, Kunihiro*; Nakamura, Mitsuhiro*; Maeda, Shigetaka   ; Iguchi, Tetsuo*

In order to establish a neutron spectrum measurement in high $$gamma$$ field such as spent nuclear fuel storage, advanced nuclear emulsion based on non-sensitized OPERA film with AgBr grain size of 60 nm has been developed. A nuclear emulsion has the feature of being easy to cause latent image degradation in the high temperature condition. In this study, the experiment estimated the temperature dependency of the sensitivity to the $$gamma$$ ray and neutron of a new nuclear emulsion. It is confirmed that the detection efficiency for a neutron and $$gamma$$ fell in more than 30 $$^{circ}$$C environment.

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