Fluctuations in Charged Particle Cross Sections
In 1960 Ericson (1) pointed out that when the excitation energy of the nucleus is high enough that the average width of the compound nucleus levels greatly exceeds their average spacing the cross section as a function of energy should exhibit random fluctuations. In the limit of Γ/D » 1 the coherence width of the fluctuations depends only on the average lifetime of the compound nucleus. The mathematical picture that he presented at that time remains valid in its essentials today. Let us spend a few minutes reviewing this picture.
KeywordsAngular Momentum Excitation Energy Level Density Reaction Cross Section Compound Nucleus
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