Neutron energy spectrum and cross sections of major nuclides (a), distribution of normalized reaction rates with energy (b). (IMAGE)

Nuclear Science and Techniques

Neutron energy spectrum and cross sections of major nuclides (a), distribution of normalized reaction rates with energy (b).

Caption

It can be observed that the cross-section in the thermal neutron region follows the 1/v law, and the cross-section curves are parallel to each other. While this behavior does not hold in the resonance region, the neutron flux in this region is relatively low, resulting in a less significant impact on reactivity.

 

Credit

Chang-Qing Yu

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