Estimate of the cross section for thermal neutrons
Yu. Petrov, V. Petrov
St.Petersburg Nuclear Physics Institute, 188300 St.Petersburg, Russia
Abstract
Cross section of the thermal neutrons in the framework of
statistical approach to the complicated nuclei is considered. We calculate
probability distribution to have given cross section σ
(determined by fluctuations of resonance positions and widths). z is the
ratio of σ to σ* where σ* is the cross section for the
model of equidistant resonances with same width. The last quantity can be
presented in terms of neutron strength function for given nuclei. Probability
distribution is universal for all nuclei.