We find the distribution of alpha particles from Li7 + H1 is not spherically symmetric, a result in disagreement with the conclusions of earlier investigators,1 who, however, worked at rather low energies only. Thick target data at energies as low as 150 ekv show the presence of a small cos2Θ term and may be represented by I(Θ) = 1 + .16 Cos2Θ while at 440 ekv the asymmetry is very marked, the data being well represented by I(Θ) = 1 + .7 Cos2 Θ. Because of the rapid increase of yield with energy, it is to be expected that thin target data will show a slightly but only slightly greater cos2 0 term. Preliminary thin target data appear to bear this out.
Proceedings of the Iowa Academy of Science
©1940 Iowa Academy of Science, Inc.
Young, V. J.; Plain, G. J.; McLean, W. B.; and Ellett, A.
"Distribution in Angle of Alpha Particles from Li7 + H1,"
Proceedings of the Iowa Academy of Science, 47(1), 286-286.
Available at: https://scholarworks.uni.edu/pias/vol47/iss1/75