Generation of particle self-shielded neutron cross-sections for the Monte-Carlo code TRIPOLI-4®

Open Access

Fig. 2.

Schematic representation of the interface between a Gd₂O₃ microsphere of 300 μm diameter and a UO₂ matrix [23]. The first phase, probably UGd₆O₁₁, exhibits gain size of about 4 μm. The second phase, consists of a solid solution of (U_1 − x,Gd_x)O_2 − y, corresponds to a diffusion zone of thickness close to 20 μm.

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