| 摘要 |
Raw material is marked for identification purposes by adding trace amts. of a matrix material chosen from H, Li, Be, B, C, N, O, F, Mg, Al, Si, Cl, Ti, V, Nb, Rb, Tl, Pb, Bi and at least one marking element from Na, P, S, Sc, Mn, Fe, Co, Zn, Ga, As, Se, Br, Rb, Sr, Y, Zr, Mo, Ru, Ag, Cd, In, Sn, Sb, Te, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Th, U. The marking element is activated by exposure to neutron radiation and recorded on a detector.
|
