Pionic Atom <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>3</mn><mi>d</mi><mo>−</mo><mn>2</mn><mi>p</mi></math> Line Shift and Width for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ca</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>40</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ca</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>44</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> and the Neutron Distribution

Raymond Kunselman; Georges-André Grin

doi:10.1103/PhysRevLett.24.838

Pionic Atom $3 d - 2 p$ Line Shift and Width for ${}^{40}{Ca}$ and ${}^{44}{Ca}$ and the Neutron Distribution

Raymond Kunselman and Georges-André Grin

Phys. Rev. Lett. 24, 838 – Published 13 April 1970

Abstract

${}^{44}{Ca}$ was found to show both a smaller shift and width than ${}^{40}{Ca}$ for the $3 d - 2 p$ pionic-atom x-ray transition. From this measurement and an optical-model analysis, it can be deduced that the neutron distribution at the surface of the ${}^{44}{Ca}$ nucleus extends significantly beyond the proton distribution.

Received 29 December 1969

DOI:https://doi.org/10.1103/PhysRevLett.24.838

Authors & Affiliations

Raymond Kunselman^*

Department of Physics, University of Wyoming, Laramie, Wyoming 82070

Georges-André Grin^†

Lawrence Radiation Laboratory, University of California, Berkeley, California 94720

^*Part of the work was performed while at the Lawrence Radiation Laboratory, University of California, Berkeley, Calif.
^†On leave from Lausanne, Switzerland with a postdoctoral fellowship, Schweizerisches Institut für Nuklearforschung-Eidgenössische Technische Hochschule. Presently at the Swiss Embassy, Washington, D. C.