High - energy photon splitting in a strong Coulomb field
نویسندگان
چکیده
The helicity amplitudes of the high-energy photon splitting in the external Coulomb field are obtained exactly in the parameter Zα. The cases of screened and unscreened potentials are investigated. The consideration is based on the quasiclassical approach, valid for small angles between all photon momenta. New representation of the qua-siclassical electron Green function is exploited. General expressions obtained are analyzed in detail for the case of large transverse momenta of both final photons compared to the electron mass.
منابع مشابه
Lepton pair production by a high energy photon in a strong electromagnetic field
Using impact–factor representation, we consider the lepton pair production by an incident high–energy photon in a strong electromagnetic field of a nucleus. By summing leading terms of perturbation series, we obtain a simple formula for the amplitude, valid to all orders in O(αZ) and arbitrary field of the nucleus. Using these results, we derive, in a simple manner, the results for the lepton p...
متن کاملSelf-energy correction to the hyperfine structure splitting of hydrogenlike Atoms.
A first testing ground for QED in the combined presence of a strong Coulomb field and a strong magnetic field is provided by the precise measurement of the hyperfine structure splitting of hydrogenlike 209Bi. We present a complete calculation of the one-loop self-energy correction to the first-order hyperfine interaction for various nuclear charges. In the low-Z regime we almost perfectly agree...
متن کاملLarge Coulomb corrections in high - energy photon splitting
The Coulomb corrections to the helicity amplitudes of high-energy photon splitting are examined. The consideration is based on the amplitudes obtained exactly in the parameter Zα within the quasiclassical approach valid for small angles between all photon momenta. We consider the case when the transverse momenta of both final photons are much larger than the electron mass. It is shown that at Z...
متن کاملEnergy and field size dependence of a silicon diode designed for small-field dosimetry
Purpose: To investigate the energy dependence/spectral sensitivity of silicon diodes designed for small-field dosimetry and obtain response factors (RFs) for arbitrary photon spectra using Monte Carlo (MC) simulations. Methods: The EGSnrc user-code DOSRZnrc was used to calculate the dose deposition in water and in the active volume of a stereotactic diode f...
متن کاملPhoton Splitting in a Very Strong Magnetic Field.
Photon splitting in a very strong magnetic field is analyzed for energy ω < 2m. The amplitude obtained on the base of operator-diagram technique is used. It is shown that in a magnetic field much higher than critical one the splitting amplitude is independent on the field. Our calculation is in a good agreement with previous results of Adler and in a strong contradiction with recent paper of Me...
متن کامل