Reconstruction of photonuclear reaction cross sections in experiments with bremsstrahlung by method of direct fitting of model data

The procedure for the photonuclear reaction cross section reconstruction by the experimental data on the bremsstrahlung γ-beams with the wide γ-photons spectrum is considered. The simple method for the cross section reconstruction is proposed. The direct selection of the supposed cross section parameters for modeling the reaction yield is applied, whereby the statically better agreement of the model yield with the experimental one is achieved. The minimum of the functional equal to the sum of the squares of the presented deviations of the model and experimental yields is chosen as the criterion of agreement. Using computerized simulation it is shown that it is possible to reconstruct reliably the initial cross section busing the proposed method with error order of 0.1-0.3 % usually observed in the bremsstrahlung experiments