Abstract
X-ray transition energies of antiprotonic atoms formed in targets of , , C, Si, P, Fe, Y, Zr, Cs, and Yb have been measured. Level shifts and widths due to the strong interaction were determined. A phenomenological fit to the data using an optical-model potential proportional to the nuclear matter density and to an effective -nucleus -wave scattering length yielded [] fm for the effective scattering length. In addition, the mass of the antiproton was determined to be 938.229 ± 0.049 MeV from the observed energies of the x-ray transitions unperturbed by the strong interaction.
NUCLEAR REACTIONS, hadronic atoms. Measured antiprotonic atom x-ray transition energies; determined strong interaction shifts and widths; deduced effective scattering length; deduced antiproton mass.
- Received 2 May 1977
DOI:https://doi.org/10.1103/PhysRevC.16.1945
©1977 American Physical Society