Strong interaction effects in high-Z K- atoms

Creators: Batty, C. J.; Eckhause, M.; Gall, K. P.; Guss, P. P.; Hertzog, D. W.; Kane, J. R.; Kunselman, A. R.; Miller, J. P.; O'Brien, F.; Phillips, W. C.; Powers, R. J.; Roberts, B. L.; Sutton, R. B.; Vulcan, W. F.; Welsh, R. E.; Whyley, R. J.; Winter, R. G.

Abstract

A systematic experimental study of strong interaction shifts, widths, and yields from high-Z kaonic atoms is reported. Strong interaction effects for the K-(8→7) transition were measured in U, Pb, and W, and the K-(7→6) transition in W was also observed. This is the first observation of two measurably broadened and shifted kaonic transitions in a single target and thus permitted the width of the upper state to be determined directly, rather than being inferred from yield data. The results are compared with optical-model calculations.

Additional Information

©1989 The American Physical Society Received 26 June 1989 We gratefully acknowledge the efforts of R. Phel, F. Goulding, D. Landis, N. Madden, and R. Trammell in developing the Ge detector system.We thank D. Lazarus, D. Lowenstein, and the AGS staffs for their support. We thank R. Meier and the hydrogen target group for the construction of the laminar target, and E.J. Austin, G.W. Dodson, J. Ginkel, D. Joyce, C. Kenney, J. Kraiman, and D.R. Tieger for their participation in portions of the experiment. We thank J. Reidy and R. Helmer for helpful discussions on absolute energy calibration and E. Borie, M. Leon, and R. Seki for the use of their computer codes. This work was supported in part by the U.S. National Science Foundation, the U.S. Department of Energy, and the United Kingdom Science and Engineering Research Council.

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