### Abstract

In the framework of quantum electrodynamics the theory of the new type of X-ray radiation from the channeled electrons in vicinity of the Bragg angle-Diffracted Channeling Radiation (DCR) is developed beyond the dipole approximation. The DCR occurs due to transitions of the channeled electrons from one transverse energy level to another with the diffraction of the emitted photon. It is demonstrated that dipole approximation is valid for the first order of diffraction DCR and not valid for higher orders of diffraction. On the basis of obtained equations for the first time it is theoretically shown that the angular distribution of the DCR is a system of very narrow ring-shaped peaks around of the Bragg direction. The calculations were performed taking into account the band structure of the transverse motion energy.

Original language | English |
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Pages (from-to) | 83-88 |

Number of pages | 6 |

Journal | Radiation Physics and Chemistry |

Volume | 109 |

DOIs | |

Publication status | Published - 1 Apr 2015 |

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### Keywords

- Bragg angles
- Channeling
- Photons diffraction
- X-ray radiation

### ASJC Scopus subject areas

- Radiation

### Cite this

**Quantum theory of X-ray radiation at Bragg angles at channeling.** / Korotchenko, K. B.; Kunashenko, Yu P.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - Quantum theory of X-ray radiation at Bragg angles at channeling

AU - Korotchenko, K. B.

AU - Kunashenko, Yu P.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - In the framework of quantum electrodynamics the theory of the new type of X-ray radiation from the channeled electrons in vicinity of the Bragg angle-Diffracted Channeling Radiation (DCR) is developed beyond the dipole approximation. The DCR occurs due to transitions of the channeled electrons from one transverse energy level to another with the diffraction of the emitted photon. It is demonstrated that dipole approximation is valid for the first order of diffraction DCR and not valid for higher orders of diffraction. On the basis of obtained equations for the first time it is theoretically shown that the angular distribution of the DCR is a system of very narrow ring-shaped peaks around of the Bragg direction. The calculations were performed taking into account the band structure of the transverse motion energy.

AB - In the framework of quantum electrodynamics the theory of the new type of X-ray radiation from the channeled electrons in vicinity of the Bragg angle-Diffracted Channeling Radiation (DCR) is developed beyond the dipole approximation. The DCR occurs due to transitions of the channeled electrons from one transverse energy level to another with the diffraction of the emitted photon. It is demonstrated that dipole approximation is valid for the first order of diffraction DCR and not valid for higher orders of diffraction. On the basis of obtained equations for the first time it is theoretically shown that the angular distribution of the DCR is a system of very narrow ring-shaped peaks around of the Bragg direction. The calculations were performed taking into account the band structure of the transverse motion energy.

KW - Bragg angles

KW - Channeling

KW - Photons diffraction

KW - X-ray radiation

UR - http://www.scopus.com/inward/record.url?scp=84920749672&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920749672&partnerID=8YFLogxK

U2 - 10.1016/j.radphyschem.2014.12.018

DO - 10.1016/j.radphyschem.2014.12.018

M3 - Article

VL - 109

SP - 83

EP - 88

JO - Radiation Physics and Chemistry

JF - Radiation Physics and Chemistry

SN - 0969-806X

ER -