Abstract
A corrected closure approximation is used to calculate the reduced rates for radiative capture of negative pions from 1s and 2p orbitals in , , and . For and the calculated rates are in good agreement with experimental data. In the case of , the calculated value for 1s capture is combined with the measured radiative capture branching ratio to obtain a value of eV for the total width of the 1s level in the pionic atom. This value when compared to the measured total width of the 1s level in pionic implies a small but definite contribution of singlet spin nucleon pairs to absorption of s-wave pions.
- Received 20 August 1987
DOI:https://doi.org/10.1103/PhysRevC.37.724
©1988 American Physical Society