. The Bell System technical journal . 10 30 RANGE OF INCIDENT CC-PARTICLES Fig. 18—Transmutation of beryllium by impact of alpha-particles, with produc-tion of neutrons; rate of observed transmutation as function of K, for a very thinfilm and for a thick layer (dashed and full curves respectively), illustrating resonance.(Chadwick; Proc. Roy. Soc).. MAXIMUM RANGE OF OrPARTICLES Fig. 19—Transmutation of aluminium by impact of alpha-particles, with produc-tion of protons; rate of observed transmutation as function of residual range of alpha-particles, illustrating resonance.
. The Bell System technical journal . 10 30 RANGE OF INCIDENT CC-PARTICLES Fig. 18—Transmutation of beryllium by impact of alpha-particles, with produc-tion of neutrons; rate of observed transmutation as function of K, for a very thinfilm and for a thick layer (dashed and full curves respectively), illustrating resonance.(Chadwick; Proc. Roy. Soc).. MAXIMUM RANGE OF OrPARTICLES Fig. 19—Transmutation of aluminium by impact of alpha-particles, with produc-tion of protons; rate of observed transmutation as function of residual range of alpha-particles, illustrating resonance. (Chadwick & Constable; Proc. Roy. Soc). CONTEMPORARY ADVANCES IN PHYSICS, XXVIII 607 In Fig. 19 the abscissa is not K, but a quantity (the range of theimpinging alpha-particles) which increases more rapidly than K\ butthis does not affect the meaning of the peaks. Moreover, there isabundant indication that quantities of such curves are simply waitingfor someone to take the data and plot them; for this is the phenomenonof resonance to which many pages ^^ were devoted in the SecondPart, and which has chiefly been observed by the other methods theredescribed, but should always manifest itself in this way when theproper experiments are performed. If we wish to interpret this without letting go of the classical theory,we must say that either or
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