caa a22 4500 386401020 CHVBK 20180307112159.0 cr unu---uuuuu 161130e198909 xx s 000 0 eng 10.1017/S0885715600016602 doi S0885715600016602 pii (NATIONALLICENCE)cambridge-10.1017/S0885715600016602 Comparison of a Solid-State Si Detector to a Conventional Scintillation Detector-Monochromator System in X-Ray Powder Diffraction Analysis [Elektronische Daten] A new Peltier-cooled solid-state Si(Li) detector has been compared to a traditional scintillation detector/diffracted-beam graphite monochromator system in conventional X-ray powder diffraction applications. Parameters studied included absolute count rates, detector linearity, peak-to-background ratios, detection limits, fluorescent radiation elimination, and peak profile shapes. Comparisons were performed on a Siemens D-500 θ-2θ diffractometer using constant sample and nondetector instrumental parameters. Advantages of the Si(Li) detector include a significantly increased count rate (3.4 - 3.8 times), primarily due to the elimination of the graphite monochromator, slightly lower background count rates, and the ability to change the analysis energy quickly. The higher count rate and slightly lower background count rate of the Si(Li) detector allow collection of data more rapidly than possible with a scintillation detector/diffracted-beam monochromator system and yield improved peak-to-background ratios and detection limits. Significant disadvantages of the Si(Li) detector include pronounced deviation from linearity at low count rates, making accurate measurement of even moderate countrate peaks difficult, and detector shutdown due to 100% deadtime between 4 and 5 × 10 4 counts/s (cps). The Si(Li) detector and the scintillation detector/diffracted-beam monochromator system are comparable in terms of fluorescence radiation elimination, resolution, and peak shape, although it appears tfiat die diffracted-beam monochromator measurably reduces the low-angle portion of the half width of all reflections. Copyright © Cambridge University Press 1989 Bish David L. Earth and Space Sciences Division, Los Alamos National Laboratory, Mail Stop D469, Los Alamos, NM 87545, U.S.A. Chipera Steve J. Earth and Space Sciences Division, Los Alamos National Laboratory, Mail Stop D469, Los Alamos, NM 87545, U.S.A. Powder Diffraction Cambridge University Press 4/3(1989-09), 137-143 0885-7156 4:3<137 1989 4 PDJ https://doi.org/10.1017/S0885715600016602 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0885715600016602 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bish David L. Earth and Space Sciences Division, Los Alamos National Laboratory, Mail Stop D469, Los Alamos, NM 87545, U.S.A NATIONALLICENCE 700 1- Chipera Steve J. Earth and Space Sciences Division, Los Alamos National Laboratory, Mail Stop D469, Los Alamos, NM 87545, U.S.A NATIONALLICENCE 773 0- Powder Diffraction Cambridge University Press 4/3(1989-09), 137-143 0885-7156 4:3<137 1989 4 PDJ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge