Abstract
The (,pp) reactions on and have been studied at =59.4 MeV with high resolution. The first triple-differential cross sections for these reactions are presented. The data are fitted to a T matrix and compared to the d→pp reaction. A model in which the pion is absorbed on a (pn) pair in the lithium nucleus describes many features of the data very well. An extrapolation of our data into unmeasured regions of phase space suggests that about 60% of the pion absorption cross section on at 59.4 MeV goes into the (,pp) channel. One surprising feature of the data is that the (,ppHe () transition at 22.1 MeV excitation is strongly populated, similar to what is observed in the (d,αHe reaction. This transition involves removing one nucleon from the 1p shell and one from the 1s shell.
- Received 21 June 1985
DOI:https://doi.org/10.1103/PhysRevC.33.614
©1986 American Physical Society