Inverse Compton Scattering of Photons and Equivalent Photons by Channeled Particles
https://doi.org/10.56304/S2304487X21040076
Abstract
The Compton scattering effect of electromagnetic waves (photons) by free electrons has been known since the beginning of the 20th century. A photon moving towards a fast electron can be scattered in the opposite direction, significantly increasing its energy due to the loss of it by the electron. When the scattering electron is not free, but moves in a single crystal in the channeling mode, periodic harmonics of the potential of atomic planes or axes along which the channeled electron moves can serve as the scattered photon. In the so-called accompanying reference system moving at the velocity, equal to the longitudinal component of the channeled particle velocity, these harmonics can be considered as electromagnetic waves (equivalent photons) interacting with the electron making finite orbital or oscillatory motion in the averaged potential of the atomic axis or plane. The result of equivalent photon backscattering is a real photon, observable as a high-energy photon in the laboratory system. Due to the discreteness of the transversal motion energy spectrum of the channeled electron, the emitted photon spectrum will also be discrete. This work continues a series of our previous studies [3–5] of effects associated with electromagnetic processes during the passage of the fast charged particles through crystal structures within a mixed quantum–classical approach. The backscattering kinematics of photons and equivalent photons by the ultrarelativistic electrons has been analyzed in detail in the general case and in the channeling mode. The characteristic frequencies have been calculated and the intensity of the resulting radiation has been estimated.
Keywords
coherent interaction,
channeling,
single crystal,
electromagnetic radiation,
equivalent photon
method,
Compton effect,
Raman scattering,
quantum mechanics,
gamma radiation
Supporting agencies: The work was carried out within the framework of the Program “PRIO- RITY 2030”
About the Authors
N. P. Kalashnikov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
115409
Moscow
A. S. Olchak
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
115409
Moscow
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Review
For citations:
Kalashnikov N.P., Olchak A.S. Inverse Compton Scattering of Photons and Equivalent Photons by Channeled Particles. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2021;10(4):289-294. (In Russ.) https://doi.org/10.56304/S2304487X21040076
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