| http://www.w3.org/ns/prov#value | - The apparatus of claim 4, wherein said control device controls said irradiation device to apply the radiation at the prescribed level for which a survival rate defined by the following equation is greater than a prescribed value: ##EQU2## where T.sub.?? is a temperature before the radiation, ??T(t) is a time profile of a temperature change, Ea is an empirical activation energy, A is a proportional
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