[en] The results of measurements of the intensity spectra of γ radiation from electrons moving along the crystallographic axes in various single crystals in a wide interval of atomic numbers Z are presented. For the first time, the measurements are carried out with a single experimental setup under the same conditions. The following characteristics of the intensity spectra are given: peak position, peak intensity, and yield in the radiation cone in absolute units per electron incident on the target. The results are compared with available theoretical predictions