A focusing X-ray polarizer for energy-dispersive analysis
作者： Poen S. Ong , John N. Randall
关键词: Diffraction 、 Detection limit 、 Brewster's angle 、 Radiation 、 Materials science 、 Spectrum analyzer 、 Optics 、 Crystal 、 Polarizer 、 X-ray 、 Spectroscopy
摘要: The Properties of diffracting crystals a Bragg and near 45° are studied for use as an X-ray polarizer. Such have many advantages over the Barkla type polarizer when used in energy-dispersive analyzer. study shows that matching λ-d combinations available, but present work was done with LiF (200). With this crystal, second order diffraction Cu Kβ radiation occurs at 43.67° improvement peak to background ratio by factor 45 obtained. revealed substantial minimum detection limit can be obtained larger deviation polarization angle, long is accompanied higher output.
sci-hub.se 参考文章(14)
R. H. Howell, W. L. Pickles, J. L. Cate, X-Ray Fluorescence Experiments with Polarized X-Rays* Advances in x-ray analysis. ,vol. 18, pp. 265- 277 ,(1974) , 10.1154/S0376030800006777
T.G. Dzubay, B.V. Jarrett, J.M. Jaklevic, Background reduction in x-ray fluorescence spectra using polarization Nuclear Instruments and Methods. ,vol. 115, pp. 297- 299 ,(1974) , 10.1016/0029-554X(74)90459-5
H. W. Schnopper, K. Kalata, Polarimeter for Celestial X Rays The Astronomical Journal. ,vol. 74, pp. 854- ,(1969) , 10.1086/110873
R.H. Howell, W.L. Pickles, Possible sources of polarized X-rays for X-ray fluorescence spectra with reduced backgrounds Nuclear Instruments and Methods. ,vol. 120, pp. 187- 188 ,(1974) , 10.1016/0029-554X(74)90123-2
L. V. Azároff, Polarization correction for crystal‐monochromatized X‐radiation Acta Crystallographica. ,vol. 8, pp. 315- 315 ,(1955) , 10.1107/S0365110X55002156
Poen S. Ong, Hollace L. Cox, Line-focusing x-ray monochromator for the analysis of trace elements in biological specimens. Medical Physics. ,vol. 3, pp. 74- 79 ,(1976) , 10.1118/1.594207
K. P. CHAMPION, R. N. WHITTEM, UTILIZATION OF INCREASED SENSITIVITY OF X-RAY FLUORESCENCE SPECTROMETRY DUE TO POLARIZATION OF THE BACKGROUND RADIATION Nature. ,vol. 199, pp. 1082- 1082 ,(1963) , 10.1038/1991082A0
H. Aiginger, P. Wobrauschek, C. Brauner, Energy-dispersive fluorescence analysis using Bragg-reflected polarized X-rays Nuclear Instruments and Methods. ,vol. 120, pp. 541- 542 ,(1974) , 10.1016/0029-554X(74)90027-5
Polarisation in Secondary Rontgen Radiation Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 77, pp. 247- 255 ,(1906) , 10.1098/RSPA.1906.0021
Arthur H. Compton, C. F. Hagenow, A Measurement of the Polarization of Secondary X-Rays* Journal of the Optical Society of America. ,vol. 8, pp. 487- 491 ,(1924) , 10.1364/JOSA.8.000487