Physics
Scientific paper
Oct 1956
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1956phrv..104..118l&link_type=abstract
Physical Review, vol. 104, Issue 1, pp. 118-123
Physics
9
Scientific paper
Differential cross sections were measured for F19(p, α)O16, to the ground state, and for Li6(p, He3)He4. The angular distribution from F19(p, α)O16 shows three maxima, which can be fitted approximately by the Born approximation for triton pickup. Empirical adjustment of phase, in the theoretical distribution, gives a better fit with a smaller nuclear radius. The cross section at 18.5 Mev is 1.5 times larger than at 16 Mev. The angular distribution of He3 particles from Li6(p, He3)He4 shows a maximum at zero degrees, explained qualitatively by deuteron pickup. Cross sections, at 18.5 and 15 Mev, are 1.1 and 1.7 times smaller, respectively, than expected, through pickup theory, from published 14-Mev data on Li6(n, t)He4. Maxima observed at 110 and 180 degrees are examined in terms of direct interaction between the proton and alpha particle in Li6; results are inconclusive, due to inadequacies of current theory. The pickup cross sections give reasonable values of triton and deuteron reduced widths in F19 and Li6, respectively.
Brady F. P.
Likely J. G.
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