The study of sensitivity and resolution of microautoradiography using Auger electrons

By using low energy beta emitter to microautoradiography, it is expected that high resolution microautoradiogram can be made. In this report, the authors pay attention to the use of monochromatic and low energy electron on the metallic samples, and used⁵¹Cr that emits Auger electrons with the energy of 4.5keV and⁶⁵Zn that emits Auger electrons with energy of 7keV in the study of the resolution of Auger electron microautoradiograph. From the results of the study, it was clearly confirmed that the resolution of the microautoradiograph using⁵¹Cr was better than 0.5 m and the resolution using⁶⁵Zn was better than 1 m.In order to make high resolution microautoradiograph, it is essentially important to know the sensitivity of the nuclear emulsion to the low energy electrons in advance, for securing the reasonable exposure to the nuclear emulsion. In this regard, the investigation on the sensitivities of those emulsions to the Auger electrons with the energy of 5.4keV from⁵⁵Fe and 7keV from⁶⁵Zn was made using Ilford and Fuji nuclear emulsions.