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The work of Bixon and Zwanzig on diffusion in the presence of a random distribution of spherical traps is extended to include more complicated dynamical processes that appear to lead to contributions of higher order in the trap density. It is shown that a class of these density corrections are divergent for long times and that when these divergent terms are resummed they modify the lowest order results of Bixon and Zwanzig.
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T. R. Kirkpatrick (1982) studied this question.
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