Beschreibung
The Electron "licroprobe X-!{ay Analyscr conceivcd b~' R C.\S'L\I:\G and A. Cl'!:'\ lEI( in 1949 has been developcd as an extremelv po\\'crful tool in spcctrochcmical analysis for a wide range of applications, ranging from qualitative elcmcntary distribution studies, to highly localiscd quantitatin analysis on a one micron scale. \\'ith the increasing number oi' versatile instruments, commcrcially available, the domain of applications - in metallurgy, solid state physics, mineralogy and geology, biology and medicine, arts and archeology - is rapidly expanding, particularly because reliable quantitative analyses can be achieved. It is well established that in multicomponent specimens, the relative x-ray intensity generated by the electron bombardment - i.e. the intensity ratio of the characteristic x-ray radiation emitted under identical experimental conditions by the specimen and a calibration standard - is not directly correlated to the elementary mass concentration. The use of a wide scale of carefully prepared homogeneous calibration standards is generally very tedious and restricted to binar)' systems. For more complex specimens, the conversion of recorded x-ra)' intensity ratios to elementary mass concentration requires, besides carefule selection of experimental conditions, an adequate correction calculation to take account oi' the various physical phenomenas occurring in the tarp;et - electron retardation, electron backseattering, x-ray excitation efficieney, fluorescence enhaneement by eharaeteristic and continuous radiation and x-ray mass absorption.
Autorenporträt
Inhaltsangabe§ 1 General Features of Electron Microprobe Analysis.- § 2 Fundamentals of Quantitative Electron Microprobe Analysis.- § 3 Procedures for Correction Calculation.- § 4 Detection Limit, Detection Threshold and Microprobe Trace Analysis.- References.- Annexed Tables.- A) Characteristic Wavelength and Excitation Potentials for K, L, M Series.- B) Determination of Effective Lenard Coefficients.- C) Table of the Electron Penetration Factor.- D) X-Ray Mass Absorption Coefficients.- E) Variation of Effective Electron Current (backscattering factor).- F) Determination of the Efficiency Function 1/f(x).
Herstellerkennzeichnung:
Springer Verlag GmbH
Tiergartenstr. 17
69121 Heidelberg
DE
E-Mail: juergen.hartmann@springer.com
