Effects of Temperature on the Leaching Behavior of Sintered Modified Synroc-B Waste form

Solomah, A. G.

doi:10.13182/nt83-a33254

Cited by 6 publications

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“…The right side of the curve in Fig. 2 was approximated by Eqn (2). It must be realized that the maximum position and the maximum height are not easily guessed in this case and that the number of useful measurement points is small.…”

Section: Interpolation Equations Of the Curves For The Sensitivity Pementioning

confidence: 99%

Energy dependence of the, sensitivity of sequential x‐ray spectrometers obtained from multi‐element standards

1986

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The sensitivity of an x-ray spectrometer as a function of the x-ray energy is defined as S = I / c = f ( E ) , where S is the sensitivity, I is the count rate per second, c is the concentration and E is the x-ray energy of the analyte line. Knowledge of its exact shape is needed to calibrate the spectrometer and to analyse minute amounts in different matrices. It can be determined experimentally using multi-element standards with low concentrations of the standard element, with careful selection of the standard and the matrix compounds. The homogeneous mixtures of powder pellets were obtained by ball-milling with the addition of lubricating agents. The grain sizes were controlled under a light microscope.Two empirical equations describing the sensitivity are proposed:where S is the sensitivity, A, B,, D and F are numerical coefficients, 6 is the Bragg angle of the analysing crystal, E0 is the energy of maximum sensitivity (Eo = 17.6 kV) and the exponent p is equal to 0.5. The ranges of validity of Eqns (1) and (2) are discussed for a PW 1410 (Cr side-window tube) and an SIMAX (Rh front-window tube) spectrometer. An application using Eqn (1) is given for the determination of the element concentrations from Nb to Ni in certified soil standards.

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Section: Interpolation Equations Of the Curves For The Sensitivity Pementioning

confidence: 99%