The influence of very small magnetic fields on radical recombination reactions in the limit of slow recombination

摘要: Abstract A magnetic field can modify the recombination probability of pairs free radicals even though it may be weaker than local (hyperfine) interactions unpaired electrons. For a radical pair born in an electronic singlet state, there is remarkably simple and general relation between (singlet) yield ΦS zero presence weak field, when very slow. The magnitude at excess its statistical value one quarter simply three times that field. origin this conditions under which obeyed are explored.