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Published January 1977 | Published
Journal Article Open

Determination of Strong-Interaction Widths and Shifts of Pionic X-Rays with a Crystal Spectrometer


Pionic 3d-2p atomic transitions in F, Na, and Mg have been studied using a bent crystal spectrometer. The pionic atoms were formed in the production target placed in the external proton beam of the Space Radiation Effects Laboratory synchrocyclotron. The observed energies and widths of the transitions are E=41679(3) eV and Γ=21(8) eV, E=62434(18) eV and Γ=22(80) eV, E=74389(9) eV and Γ=67(35) eV, in F, Na, and Mg, respectively. The results are compared with calculations based on a pion-nucleus optical potential.

Additional Information

© 1977 The American Physical Society. Received 15 November 1976; published in the issue dated 31 January 1977. We could not have performed this experiment without the help and encouragement of Dr. R. Siegel and his staff. Work supported by U. S, Energy Research and Development Administration under Contract No. AT[04-3]-63.

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