“…Huffman and Dunmyre (143) used 119Sn to study surface properties of tinplate, showing that quantitative thickness determination can be made for oxide coatings up to several hundred angstroms. Sedunov et al (278) used scattered radiation to study surface composition when steel is carburized or carbonitrided: depth selection was effected by counting the scattered -rays (~1 µ depth) and separately the scattered electrons (~0.1 µ depth). Huffman and Stanley (145) used similar techniques to study Si-sheet steel during annealing in H2-N2-H20 atmospheres.…”