. Carnegie Institution of Washington publication. 92 STUDIES IN LUMINESCENCE. temperature and allowed to decay to 7 = before heating. The points are joined by straight lines to aid the eye in following the individual curves. Two effects are noticeable at a glance. The maximum intensity increases with excitation and is shifted to the right, i. e., comes at a later time. The effect of saturation is shown. This is brought out more clearly in Fig. 89. Fig. 88.—Curves similar to Fig. 87. Effect of varying the length of excitation. The length of excitation and the temperature of the furnace are
. Carnegie Institution of Washington publication. 92 STUDIES IN LUMINESCENCE. temperature and allowed to decay to 7 = before heating. The points are joined by straight lines to aid the eye in following the individual curves. Two effects are noticeable at a glance. The maximum intensity increases with excitation and is shifted to the right, i. e., comes at a later time. The effect of saturation is shown. This is brought out more clearly in Fig. 89. Fig. 88.—Curves similar to Fig. 87. Effect of varying the length of excitation. The length of excitation and the temperature of the furnace are as follows: Run 6, sec, 309° C; run 5, sec, 3080 C; run 4, sec. 3080 C; run 3, sec, 3080 C; run 2, sec, 309" C; run i, sec, 307° C. Fig. 89.—Saturation effect. 7M vs. length of excitation. Curve A, temperature 3080 C: curve B, temperature 2670 C; curve C, temperature 207° C.; curve D, temperature 155 5 C; curve E, temperature 980 C. I JO ' -J' B it 5 s 12 (K __£__ L ^ > B ^ 300^ J30 ](.0 hi& t*» 4'.fl_. lito. A 1320 Sec Fig. 90. Effect of delay in heating. Time measured from the end of excitation. Excited 320 seconds at room temperature. Temperature of furnace 3030 C Curve A, decay at room temperature. The time between the end of excitation and the beginning of heating is as follows: Curve B, seconds; C, seconds; D, seconds; E. seconds; F. seconds; G, seconds; //, seconds; /, seconds. that further increase with increased excitation is limited. The shifting of maximum intensity resembles an inertia effect; the longer the excitation the longer it takes the temperature to produce the maximum Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Insti
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