Annihilation of matter and antimatter and the cosmic X-ray background

Details Annihilation of matter and antimatter and the cosmic X-ray background Annihilation of matter and antimatter and the cosmic X-ray background

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.260..225c&link_type=abstract

Nature, vol. 260, Mar. 18, 1976, p. 225, 226.

Physics

6

Annihilation Reactions, Background Radiation, Electron Radiation, X Ray Sources, Antimatter, Compton Effect, Cosmic Rays, Galactic Nuclei, High Energy Electrons, Intergalactic Media, Matter (Physics), Quasars, Relativistic Particles, Synchrotron Radiation

Scientific paper

When optical photons are scattered against the relativistic electrons produced by the annihilation of matter and antimatter, X-rays are produced by the inverse Compton effect. The efficiency of this X-ray mechanism in intergalactic space is investigated on the basis of a simplified model. The inverse Compton spectrum obtained from the model is in good agreement with observational data on the cosmic X-ray background over the interval 1 keV to 100 keV. A mean electron density calculated for the energy interval 10 MeV to 100 MeV is about two orders of magnitude smaller than the mean atom density of galactic material throughout the Universe. The magnetic field required to yield a stationary spectrum for the electron energies of interest is calculated to be greater than .00002 Gauss, indicating an intensity of synchrotron radiation in the radio band produced by the annihilation electrons necessary to produce the X-rays which is higher than experiment allows. Annihilation electrons may be created in quasars and galactic nuclei where a rapid decay in the electron energy occurs. The annihilation electrons escape into intergalactic space, become uniformly distributed, and produce the X-ray background by interacting with optical photons.

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