. The Bell System technical journal . REFLECTION CLEAN SURFACE Fig. 2—The effect of the removal of surface gas upon a (622) diffraction beam adsorbed gas. The intense diffraction beams shown at the right ofFigs. 1 and 2 became weaker, finally reaching the intensities shown bythe left-hand curves. The time required for this change to occurvaried from less than an hour to many weeks, depending upon thevacuum condition of the bulb. In Fig. 3 is shown the effect of cleaning the crystal surface upon theintensity of a (331) reflection, and in Fig. 4 the effect upon a (551)reflection. The curves eith
. The Bell System technical journal . REFLECTION CLEAN SURFACE Fig. 2—The effect of the removal of surface gas upon a (622) diffraction beam adsorbed gas. The intense diffraction beams shown at the right ofFigs. 1 and 2 became weaker, finally reaching the intensities shown bythe left-hand curves. The time required for this change to occurvaried from less than an hour to many weeks, depending upon thevacuum condition of the bulb. In Fig. 3 is shown the effect of cleaning the crystal surface upon theintensity of a (331) reflection, and in Fig. 4 the effect upon a (551)reflection. The curves either side of the centers in these figures showhow selective are the occurrences of these diffraction beams. Thedisappearance of the diffraction beams as the wave-length is changedfrom the critical value of A. for the (331) reflection and .912 the (551) reflection respectively is much less sudden than the APPLICATION OF ELECTRON DIFFRACTION 595. {331} REFLECTION CRYSTAL SURFACE CONTAMINATED BY ADSORBED GAS
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
