Abstract
Negative pions produced by the National Aeronautics and Space Administration Space Radiation Effects Laboratory cyclotron were stopped in water and the nuclear deexcitation rays observed. rays from , , and were identified, and yields to particular states in these nuclei obtained. A prominent -ray peak in our spectra was from the 3.945-MeV state in which was formed with a rate of 1.8% per stopped pion. The Doppler-broadened line shape of the decay ray for this state was analyzed to obtain the momentum distribution of the recoiling nucleus. This momentum distribution is compared with momentum distributions obtained by related experiments, and to theoretical predictions. Yields to various states are presented and discussed.
- Received 30 June 1971
DOI:https://doi.org/10.1103/PhysRevC.4.1551
©1971 American Physical Society