The Use of Radioactive Fission Product Rare Gases for the Study of the Phase Change in Fine Particles

Abstract

Hahn first investigated the emanation method which used radioactive radon nuclides as tracers.In the present work, the use of radioactive fission product rare gas for the emanation method in place of radon was proposed. The crystal structure change of γ-hematite to α-hematite was studied by this method and high temperature X-ray diffraction method was employed for the identification of the crystal.The usefullness of this emanation method for the studies in the field of physical chemistry is also discussed.