ReactionF19(d, p)F20and the Spin ofF20

Abstract

New measurements of the angular distribution of the protons from the reaction ${\mathrm{F}}^{19}(d, p){\mathrm{F}}^{20}$ made with deuterons in the range $3.5\le E_d\le 4.1$ Mev show that the reaction proceeds mainly by compound-nucleus formation, and that stripping makes at most a small contribution. It follows that the interpretation of the results of an earlier experiment in terms of stripping is unjustified, hence that the spin of ${\mathrm{F}}^{20}$ is not necessarily 1. At all energies the angular distribution of protons leaving ${\mathrm{F}}^{20}$ in its first excited state shows a clear stripping curve corresponding to $l_n=2\mathrm{}$.