Yields of hydrogen isotopes in stopped-pion absorption by light nuclei

The spectra of p, d, and t charged particles produced in stopped-pion absorption by nuclei are analyzed. Respective measurements were performed for 17 nuclei by means of a semiconductor spectrometer. A phenomenological model developed previously for medium-heavy and heavy nuclei was applied to describing the spectra and yields of charged particles originating from light nuclei (^6,7Li, ⁹Be, ^10,11B, and ¹²C). The contribution of intranuclear clusters (such as pp and ^3,4He) to pion absorption was estimated.