By R. Castaing (auth.), K. F. J. Heinrich, Dale E. Newbury (eds.)

In 1968, the nationwide Bureau of criteria (NBS) released unique book 298 "Quantitative Electron Probe Microanalysis," which contained complaints of a seminar hung on the topic at NBS in the summertime of 1967. This e-book got broad curiosity that persisted over the years a long way past expectancies. the current quantity, additionally the results of a meeting of foreign specialists, in 1988, at NBS (now the nationwide Institute of criteria and expertise, NIST), is meant to meet an identical objective. After years of considerable contract at the approaches of research and information assessment, numerous sharply differentiated ways have constructed. those are defined during this publi­ cation with the entire info required for functional software. Neither the editors nor NIST desire to recommend any unmarried procedure. really, we are hoping that their exposition will stimulate the discussion that is a prerequisite for technical development. also, it truly is anticipated that these lively in examine in electron probe microanalysis will savour extra truly the parts during which extra investigations are warranted.

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D. (1974), J. Phys. D: Appl. Phys. 7, 2131-2141. Duncumb, P. and Me1ford, D. A. , Deschamps, P. , Hermann, Paris, 240-253. Reed, S. J. B. (1965), Br. J. Appl. Phys. 16, 913-926. Sewell, D. , and Scott, V. D. (1987), J. Phys. D: Appl. Phys. 20, 1567-1573. Darlington, E. H. (1975), J. Phys. D: Appl. Phys. 8, 85-93. Pouchou, J. L. and Pichoir, F. (1984), Recherche Aerospatiale, no. 3, 167-192. QUANTITATIVE ANALYSIS OF HOMOGENEOUS OR STRATIFIED MICROVOLUMES APPLYING THE MODEL "PAP" JEAN-LOUIS POUCHOU AND FRANCOISE PICHOIR Office National d'Etudes et de Recherches Aerospatiales 92320 Chatillon, France I.

12) The expressions needed for the calculation are given in Appendix 1. S)Q/(E0) C. (13) PARABOLIC REPRESENTATION OF THE DISTRIBUTION cp(pz) To satisfy the requirements exposed in paragraph A, the distribution cf>(pz) was mathematically expressed by means of two parabolic branches, equal in value and slope at a certain mass depth level Rc (fig. 6). The conditions imposed on the distribution are: - the integral must be equal to F at the surface, a certain value of cf>(O) must be obtained the maximum must appear at a certain value Rm the function must vanish, with a horizontal tangent, at a predetermined range of ionization, Rx.

577 Analyses Effect of Z 826 Analyses Procedure XPP PAP Love-Scott Tanuma-Nagashima Bastin 861 ZAF f(x) Heinrich ZAF Philibert simpl. 07% 44 ELECTRON PROBE QUANTITATION - - chemical binding effects which modify the position and spectral distribution of the characteristic emission bands. It is even possible that the chemical binding may affect the characteristic features of emission such as fluorescence yield or transition probabilities between levels. No model takes into account such modifications, which apparently occur in cases such as borides of cobalt and especially of nickel.

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