= Binary collision approximation
{wiki=Binary_collision_approximation}
The binary collision approximation (BCA) is a simplified model used in the field of nuclear and particle physics, as well as in materials science, to describe the interactions between particles in a medium. The primary assumption of the BCA is that the collisions between particles occur one at a time and are treated as discrete events, with other particles treated as static or unaffected during these collisions.
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