SITE DETERMINATION OF RADIOACTIVE ATOMS FROM THE INTERFERENCE EFFECT OF ELECTRON-CAPTURE RAYS - STRUCTURAL-CHANGE OF IN-111-LABELED AZOBENZENE DERIVATIVE

The structural change of a In-111-labelled azobenzene derivative was e xamined using the interference effect of electron-capture X-rays emitt ed by nuclear transformations in radioactive atoms. Interference fring es were generated between the direct monochromatic emission from the r adioactive atoms and the emission totally reflected by the substrate s urface. The site of a radioactive atom can be determined by analysing the measured interference fringes, because the period of these fringes depends on the position of the radioactive atoms relative to the subs trate surface.