>> An apparent continuum in a reflectance spectrum is modeled as a mathematical function used to isolate a particular absorption feature for analysis. The calculated masses are all somewhat lower (by about 10-30%) than the corresponding measured masses. metals, alloys, and semiconductors, occurs in the first 10–20 nm. x��[ے��q}���#Z�
���7۔"h�����4��n������h��>Y �Y��� ��P����'������N��o������~�w�D����L_v�O�~|��{|�H|.C�xz�o��;(�٨m����^0��Q���pģ!��y�ׇc��I�N��h�b��;1`���� x�3R��2�35W(�*T0P�R0T(�Y@���@QC= P A�J��� �Tp�W� endstream We have carried out measurements of the reflectance spectrum from 1 to 13 eV on ordered and on disordered Cu3Au. endobj 12 0 obj Figure 5. One of the most important criteria for explosive detection techniques is the limit of detection. /Outline /Span /Type /Page Electrical conductivity was measured using the four-probe method. D:20130715074535 0000105326 00000 n
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n���+�KR�dp�������j Herein, for the first time we applied metal-metal bond energy factor for the evolution of porous Se-Te alloy. For these experiments a thin film, several thousand Ångströms thick, was used whose composition varied continuously from one end to the other. >> << /Font << The Fermi surface is presented and is found to originate mainly in copper 4s and 4p states. These Reflectivity measurements on dilute gold-iron alloys by a new method are reported. /C2_1 40 0 R 0000006191 00000 n
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/Parent 3 0 R x�3R��2�35W(�*T0P�R0T(�Y@���@QC= P A�J��� �1Wp�W� <> 116 0 R 117 0 R 118 0 R 119 0 R 120 0 R 121 0 R 122 0 R 123 0 R 124 0 R 125 0 R >> /GS0 53 0 R /CS1 [/ICCBased 45 0 R] 6-μm excitation. 443 0 obj
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Two different oxides could be identified which were formed during immersion of the samples in an electrolyte while applying various potentials to them. /Creator (Acrobat PDFMaker 10.0 for Word) They believe that this peak arises from a new gap upon ordering whereas we attribute it to new transitions in the same region of k space. The data appear to be consistent with the coherent-potential-approximation calculations of the density of states for Ni-rich alloys. 2013-09-16T13:22:09+02:00 /TT1 36 0 R Some features of the site may not work correctly. null null 91 0 R 92 0 R 193 0 R 194 0 R 195 0 R 196 0 R 197 0 R 198 0 R /Rotate 0 /TT2 36 0 R endobj The results accurately reproduce the experimentally determined trigonal response, W44(ω), for Cu, Ag and Au and provide accurate determinations of the threshold and Lu1 − L′2 gap energies and information about deformation potentials. It is shown that: (1) alloying of silver and aluminium reduces the solar-weighted reflectance, (2) solute additions may slightly improve the corrosion resistance of silver but in turn reduce the reflectance, (3) the parameters which affect the reflectance of a pure metal include kind and number of solute atoms, surface reactions, surface conditions, kind of mirror preparation and interband transitions. /ParentTree 16 0 R Die elektronische Struktur von α–Kupfer–Kobalt-Legierungen wird mit Hilfe der Differenzreflektometrie untersucht. Upon reflection, the light is collected with a spectrometer combined with a CCD camera. detection limits for common explosive compounds endobj Cu-21.4% Zn alloys (yellow brass) showed dezincification in less than one hour potentiostating time at pH ∼4 and minus 105 mVSHE (minus 350 mVSCE). >> endobj For the comparison technique, thin-film samples of ordered, disordered, and amorphous Cu3Au of varying stoichiometry were prepared. << 0000016940 00000 n
endobj The measurements are fast: a complete differential reflectogram, that is, an automatic scan from the UV through the visible into the IR region, is accomplished xڔT{L�W?���B��a��єwqa(hB��m$#T��1ؔ�(�� Hs���NA!�C�F�y)�2'�ܔd������͗�����s~�� �z@vx�e�0@�&3�B�AE�>�1@L���'�3��&܊�E�̣�Q���1���1�^ -nn_ZO��K{�V��x��^���-���(������PL��ܫ�H~��:���)Io�r� -
� 21 0 obj /Contents 6 0 R>> 12 0 obj Reflectance spectroscopy from TiO 2 particles embedded in polyurethane . We present here, a method to evaluate the limit of detection of our technique. /Contents [25 0 R 26 0 R 27 0 R 28 0 R 29 0 R 30 0 R 31 0 R 32 0 R] Some kinetic data for isothermal annealing and solid-phase epitaxial regrowth of amorphous layers are presented. <>/Group <> As an example, 2,4,6, trinitrotoluene (TNT) displays strong and distinct features in differential reflectograms near 420 nm. the amount of sample available, the sample matrix, /MediaBox [0.0 0.0 595.32 841.92] � ��� Deposition geometry dependent linear thickness increase, between 1.5–2.5 nm per laser burst, was achieved. 0000025631 00000 n
endobj Finally, we present our sample preparation method and experimental set-up specifically developed to measure the limit of detection for our technology. Cuprous oxide was not prominent in the differential reflectograms obtained from yellow brass. %%EOF
In fact, color has been used for more than 75 yr to obtain information about these soil properties with a goal of characterizing and distinguishing soil types. /StructParents 7 7 0 obj The present calculations are compared with the available experimental results on α-brass. endobj null 222 0 R null null null null 223 0 R null null null /ColorSpace << This differential technique is highly sensitive and provides spectroscopic data of materials, particularly of explosives. endstream uuid:65a0d7a0-e487-4ecf-aa8c-d0b9065b19b6 azimuth angle (I) -- 0; that is, the incident light is coming from … AB5-type rare earth element (REE)-nickel compounds are currently studied from both theoretical and practical points of view. >> It is believed that these discrepancies reflect the contributions of the effects neglected in the individual-electron model. The dezincification behavior of red brass differed both in degree and kind from that observed in yellow brasses. %PDF-1.6
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LowLODscan be achieved using ion detection techniques: