Versatile x-ray analysis program combining fundamental parameters and empirical coefficients

Abstract

A computer program, called nrlxrf, which employs a combination approach utilizing both fundamental-parameter expressions and empirical coefficients has demonstrated versatility and accuracy for multicomponent x-ray analysis. The program takes advantage of all standard reference materials that have been measured. Analysis can also be accomplished with only one multicomponent standard and no pure-element standards. Results agree with National Bureau of Standards certified values within 1.2 % relative for major constituents and 1.6% relative for minor constitutents. The computer program can calculate primary spectra if given the x-ray tube target material and operating voltage. Thin samples as well as thick samples, either homogeneous or heterogeneous, can be analyzed.

Photoelectron Effects on the Dose Deposited in MOS Devices by Low Energy X-Ray Sources

“…The indicated deposition was caused by a commercial Cu target x-ray tube operated at 45 keV with a .025 gm/cm2 thick Ni filter used to eliminate eliminate most of the Cu KS line. The spectral output of the tube was obtained using a program developed by J.W.Criss (11). The output of this program has been shown to be in agreement with experimental data and with the prediction of more elaborate programs (6,7).…”

Calculation of Theoretical Alpha Coefficients for XRF Analysis of Major and Minor Elements in Iron-rich Geological Samples

“…The calculation of the theoretical X-ray fluores cence relative intensities was performed by the NRLXRF program [14][15][16], The theoretical X-ray relative intensity can be calculated for any known composition and operating conditions. If we input the assumed compositions of the hypothetical standard samples given in Table 1, then the theoretical relative X-ray fluorescence intensities can be calculated using the fundamental parameter formulas modified by Criss and Birks [17].…”

X-ray fluorescence analysis of superconductor YBa2Cu3O7-.DELTA. by glass bead - FP method.

“…The composition of the sample was calculated using NRLXRF,11) a Fortran program developed by Criss.5,6) The net intensities of YKa, BaKa [BaLa] The glass bead fragments formed thereby are shown in Fig. 3 as shownin Fig.…”