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  • 1 Toyama University Faculty of Literature and Science Toyama (Japan)
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The detection of tritium and14C-ethylene on the surface of nickel sheet was carried out by means of autoradiography. Two autoradiographical methods were used, the ordinary stripping-film method and the electron-microscope autoradiographical method. The ordinary autoradiographs indicated that14C-ethylene accumulates at scratches on the surface of the sheet; however, tritium accumulates at grain boundaries and scratches. Electron-microscope autoradiographs indicated that tritium accumulates on the step-edges of slip band of nickel.