Influence of radionuclides formed at the surface

INFLUENCE OF RADIONUCLIDES FORMED AT THE SURFACE-REMOVAL OF A SURFACE LAYER AFTER THE IRRADIATION [Pg.55]

The possibility of eliminating surface contamination by etching after irradiation is one of the major advantages of activation analysis. In charged particle activation analysis, a surface layer is in general removed from the sample after the irradiation to remove radionuclides formed from the element of interest at the sample surface that recoil into the sample. [Pg.55]

At the same time, radionuclides formed in the beam intensity monitor foil that recoil into the sample are removed and the influence of contamination before the irradiation is overcome. [Pg.55]

The thickness of the surface layer that must be removed is determined by the maximum range of the recoil nuclei. [Pg.55]

The energy of the recoil nucleus for a given nuclear reaction can be calculated as a function of the angle of emission by means of the formulae given by Marion and Young (40). For the nuclear reaction illustrated in Fig. 11-22, the energy in the laboratory system for the heavy product is [Pg.55]

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