Those include electron-positron annihilation, neutral pion decay, bremsstrahlung, inverse Compton scattering, and synchrotron radiation. High-energy electrons and positrons primarily emit photons, a process called bremsstrahlung. Electrons from ionized atoms interact mainly with neutral atoms, causing thermal bremsstrahlung radiation. Axions may be produced within neutron stars, by nucleon-nucleon bremsstrahlung. The photons can be in form of X-rays, gamma rays, and bremsstrahlung. See for example Bremsstrahlung and synchrotron light. The interaction between emitted electrons and matter can lead to the emission of Bremsstrahlung radiation. In a strong magnetic field cyclotron radiation is even larger than the bremsstrahlung. The acceleration of the electron results in the emission of Bremsstrahlung radiation. When the electrons hit a target they generate both characteristic x-rays and bremsstrahlung. The emission from the intracluster medium is characterized by thermal bremsstrahlung. Bremsstrahlung emitted from plasma is sometimes referred to as free-free radiation. Other applications include bremsstrahlung and the photoelectric effect. This is referred to bremsstrahlung radiation, and is common in fusors. Finally, all channels of energy loss other than Bremsstrahlung have been neglected.