The yield of alpha particles of range greater than 2 cms. from boron bombarded by protons has been studied as a function of bombarding energy in the range from 100 to 200 ekv, using a thin target, either methyl borate or boron trifluoride at pressures of 1 mm. of Hg. The yield vs. energy curve shows an approximately exponential rise on which is superposed a sharp (half breadth ~ 6 ekv) intense line at 150 ± ekv. There is some indication of a weaker and much broader line at 190 ekv. Number range curves are not yet available, but the appearance of pulses on the oscillograph screen leads us to suppose that the high yield (line) at 150 ekv is due to emission of a homogeneous long-range group.
Proceedings of the Iowa Academy of Science
© Copyright 1940 by the Iowa Academy of Science, Inc.
McLean, W. B.; Young, V. J.; Whitson, W. L.; Plain, G. J.; and Ellett, A.
"The Resonance in the B-P-a Reaction,"
Proceedings of the Iowa Academy of Science, 47(1), 286-287.
Available at: https://scholarworks.uni.edu/pias/vol47/iss1/76