X-rays from proton-antiproton annihilation into charged final states

Academic Article


  • X-rays originating in the deexcitation of pp̄ atoms and their subsequent annihilation into two charged and any number of neutral mesons have been measured with a position and energy-sensitive drift proportional chamber. The atomic L-lines and the inner bremsstrahlung are clearly observed. The theoretically predicted differential probability for production of inner bremsstrahlung is confirmed. Additional features in the X-ray spectrum are attributed to K-lines and a nearly flat background which is probably due to Compton scattering in the detector of higher energy X- and γ-rays. The absolute yield of L-lines per antiproton stop is YL =0.11 (2), the corresponding value for K-lines is KK = 0.0014 (6). © 1989.
  • Authors

    Published In

  • Nuclear Physics A  Journal
  • Digital Object Identifier (doi)

    Author List

  • Schaefer U; Ahmad S; Amsler C; Armenteros R; Auld EG; Axen D; Bailey D; Barlag S; Beer G; Bizot JC
  • Start Page

  • 451
  • End Page

  • 462
  • Volume

  • 495
  • Issue

  • 3-4