Abstract
The absolute majority of photonuclear reaction cross‐section data have been obtained in two different type experiments using electron bremsstrahlung and quasimonoenergetic photons produced by annihilation in flight of relativistic positrons. Unfortunately there are many clear systematical disagreements both in shape and magnitude between data obtained in different experiments. Very shortly most of them can be described as following: as a rule reaction cross sections obtained in experiments using quasimonoenergetic annihilation photons in comparison with those obtained in experiments using bremsstrahlung look much smoother. The reasons for that were investigated in detail on the basis of all (final and intermediate) results of some typical experiments with annihilation photons. It was shown that photonuclear reaction cross sections obtained with annihilation photons are strongly over‐smoothed and the real energy resolution is several (3–4) times worse than estimated one (calculated positron annihilation li...
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