Evaluation of photonuclear reaction cross-sections using the reduction method for large systematic uncertainties

摘要

The authors describe a method based on the reduction method for the evaluation of photonuclear reaction cross-sections obtained under conditions where there are large systematic uncertainties (different instrumental functions, calibration and normalization errors). The evaluation method involves using the actual instrumental function (photon spectrum) of each individual experiment to reduce the data to a representation generated by an instrumental function of better quality. The objective is to find the most reasonably achievable monoenergetic representation of the information on the reaction cross-section derived from the results of various experiments and to take into account the calibration and normalization errors in these experiments. The method was used to obtain the evaluated total photoneutron reaction cross-section ((gamma),xn) for a large number of nuclei. Data obtained for (sup 16)O and (sup 208)Pb are presented. (author). 36 refs, 6 figs, 4 tabs. (Atomindex citation 27:020857)