Determination of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>2</mn><mi>p</mi><mo>−</mo><mn>1</mn><mi>s</mi></math></span> transition energy and strong interaction shift in pionic hydrogen using crystal diffraction

A. Forster; E. Bovet; J. Gimlett; H. E. Henrikson; D. Murray; R. J. Powers; P. Vogel; F. Boehm; R. Kunselman; P. L. Lee

doi:10.1103/PhysRevC.28.2374

Determination of the $2 p - 1 s$ transition energy and strong interaction shift in pionic hydrogen using crystal diffraction

A. Forster, E. Bovet, J. Gimlett, H. E. Henrikson, D. Murray, R. J. Powers, P. Vogel, F. Boehm, R. Kunselman, and P. L. Lee

Phys. Rev. C 28, 2374 – Published 1 December 1983

Abstract

The $2 p - 1 s$ atomic transition in pionic hydrogen has been studied with the help of a point-focusing graphite diffraction spectrometer. The transition energy was measured to be $E (2 p - 1 s) = 2433.5 \pm 1.7$ eV. From this result a strong interaction shift of -3.9±1.7 eV was derived. The $K α$ x-ray yield in the 2.7 atm hydrogen target at 40 K was found to be 0.025±0.013 per stopped pion.

Received 29 July 1983

DOI:https://doi.org/10.1103/PhysRevC.28.2374

Authors & Affiliations

A. Forster, E. Bovet^*, J. Gimlett, H. E. Henrikson, D. Murray^†, R. J. Powers, P. Vogel, and F. Boehm

California Institute of Technology, Pasadena, California 91125

R. Kunselman

University of Wyoming, Laramie, Wyoming 82071

P. L. Lee

California State University of Northridge, Northridge, California 91330

^*Present address: Physics Department, University of Neuchâtel, Neuchâtel, Switzerland.
^†Present address: GEC Hirst Research Centre, Wembley, Great Britain.

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Vol. 28, Iss. 6 — December 1983

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Physical Review C

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