The consequences of an exchange contribution to a specific stripping reaction are worked out in some detail. The particular transition considered is that which leads to the first excited state of ${\mathrm{B}}^{11}$ and which is forbidden by the angular momentum restrictions of ordinary stripping theory. The exchange calculation provides a fair measure of agreement with experiment on the angular distribution, yield, and energy dependence of the reaction. The relation of the present analysis to treatments of heavy-particle and spin-flip stripping is briefly discussed.

• Received 31 October 1957

DOI:https://doi.org/10.1103/PhysRev.109.1272