experiment 9 radioactivity-1

experiment 9 radioactivity-1 - R² = 0.9365591825 Counts vs...

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Experiment 9.a - Radioactivity Course Voltage = 800 Fine = 175 Background Radiation average = 158 Table 1 r count net count ln [r] ln(N) 0.1 4387 4229 -2.302585093 8.3497208375 0.15 1900 1742 -1.8971199849 7.4627891574 0.2 944 786 -1.6094379124 6.6669567924 0.25 606 448 -1.3862943611 6.1047932324 0.3 424 266 -1.2039728043 5.5834963088 u= 0.001501 Table 2 Table 3 Material Counts # of Sheets Counts (N) ln(N) Lead 89 6 362 5.891644 Aluminum 102 5 414 6.025866 Copper 81 4 456 6.122493 Plexiglas 101 3 561 6.329721 2 701 6.552508 1 907 6.810142 0 1191 7.082549 Experiment 9.b - Radioactivity of Barium Time (s) Counts Corrected Counts 0 217 181 30 162 126 60 143 107 90 134 98 120 127 91 150 129 93 180 103 67 210 95 59 240 82 46 270 77 41 300 83 47 330 71 35 360 69 33 390 61 25 420 57 21 450 48 12 480 56 20 510 60 24 540 50 14 570 51 15 600 45 9 2.888113 0.028175 0 100 200 300 400 500 600 700 0 50 100 150 200 250 f(x) = 166.7679371144·0.9976588718^x
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Unformatted text preview: R² = 0.9365591825 Counts vs Time (s) Time (s) Counts-2.4-2.2-2-1.8-1.6-1.4-1.2-1 2 4 6 8 10 f(x) = -2.5264785149x + 2.5893654064 R² = 0.9974477816 ln(N) vs ln(r) Ln(r) ln(N) 100 200 300 400 500 600 700 20 40 60 80 100 120 140 160 180 200 f(x) = 152.1730442263·0.9955659736^x R² = 0.9511527458 Corrected Counts, vs Time (s) Time (s) Corrected Counts 1 2 3 4 5 6 7 200 400 600 800 1000 1200 1400 f(x) = 1095.5971158348·0.8195709355^x R² = 0.9743988526 N vs x x N 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 f(x) = -0.1989743251x + 6.9990548049 R² = 0.9743988526 ln(N) vs x x...
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This note was uploaded on 11/27/2011 for the course PHYS 105 taught by Professor Walker during the Fall '08 term at UNC.

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