Kaye, G. W. C. (George William Clarkson), 1880-1941 · London, New York [etc.] Longman's Green, and Co. · leaf 158
owing to the absorption of the softer components. It isnot until the radiation is reduced to about riv of itsinitial value that the absorption curve becomes very nearlya straight line, at any rate with the higher voltages. Thisshows that the end-radiation is approximately homo-geneous. At the… … 10 IS 20 25 30 35 40 ThicknessafAlvminium inmms. Fig. 66.—Log-absorptioa curves, for Al screens, of the X rays from aOoolidge tube with tungsten anticathode. The highest voltage used by Rutherford {P.M. 1917) was196,000 volts. The rays were filtered through 1 cm. oflead, the reduction in intensity…
X-rays
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