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Nuclear Physics in a Nutshell by Carlos A. Bertulani

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11 Nuclear Reactions—II

11.1 Direct Reactions

We have already mentioned the existence of reactions that occur within a short duration of the projectile-target interaction. Several of these mechanisms of direct reaction are known. This reaction type becomes more probable as one increases the energy of the incident particle: the wavelength associated with the particle decreases and localized areas of the nucleus can be “probed” by the projectile. In this context, importance in placed on peripheral reactions, where only a few nucleons of the surface participate. These direct reactions happen during a time of the order of 10−22s; reactions in which the formation of a compound nucleus can be up to six orders of magnitude slower. We should notice that ...

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