Observation of Radiative Capture in Relativistic Heavy-Ion—Atom Collisions

R. Anholt; S. A. Andriamonje; E. Morenzoni; Ch. Stoller; J. D. Molitoris; W. E. Meyerhof; H. Bowman; J. -S. Xu; Z. -Z. Xu; J. O. Rasmussen; D. H. H. Hoffmann

doi:10.1103/PhysRevLett.53.234

Observation of Radiative Capture in Relativistic Heavy-Ion—Atom Collisions

R. Anholt, S. A. Andriamonje, E. Morenzoni, Ch. Stoller, J. D. Molitoris, W. E. Meyerhof, H. Bowman, J. -S. Xu, Z. -Z. Xu, J. O. Rasmussen, and D. H. H. Hoffmann

Phys. Rev. Lett. 53, 234 – Published 16 July 1984

Abstract

X-ray studies of relativistic heavy-ion-atom collisions allow the direct observation of the radiative-electron-capture photons. The angular distribution of these photons is approximately ${sin}^{2} θ_{lab}$ , because of the cancellation of electron retardation effects when the cross sections are subjected to Lorentz transformation into the laboratory frame. Comparison of measured and calculated cross sections reveals the number of equilibrium projectile $K$ vacancies present in the solid targets, which can be compared with charge-state measurements behind the target.

Received 9 April 1984

DOI:https://doi.org/10.1103/PhysRevLett.53.234

Authors & Affiliations

R. Anholt, S. A. Andriamonje^*, E. Morenzoni^†, Ch. Stoller, J. D. Molitoris, and W. E. Meyerhof

Department of Physics, Stanford University, Stanford, California 94305

H. Bowman, J. -S. Xu^‡, Z. -Z. Xu^‡, and J. O. Rasmussen

Nuclear Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

D. H. H. Hoffmann

Gesellschaft für Schwerionenforschung, Darmstadt, West Germany

^*Permanent address: Centre d'Etudes Nucléaires, University of Bordeaux, Gradignan, France.
^†Present address: Laboratory for Medium-Energy Physics, Eidgenössische Technische Hochschule Hönggerberg, Zurich, Switzerland.
^‡Permanent address: Department of Physics, Fudan University, Shanghai, Peoples Republic of China.