The Resonant Bremsstrahlung of Ultrarelativistic Electrons on a Nucleus with Radiation of Hard Gamma-Quanta in the Presence of a Pulsed Field of the X-ray Pulsar

Alexander Dubov,Sergei P Roshchupkin,Victor V Dubov

doi:10.3390/universe6090143

Alexander Dubov, Sergei P Roshchupkin + Show 1 more

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https://doi.org/10.3390/universe6090143

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Abstract

The investigation scrutinizes the circulation of the large-scaled fluxes of ultrarelativistic electrons near the neutron stars. This work focuses on the effects that occur during the adjustment of the strong electromagnetic field near the X-ray pulsars. Particularly, this study analyzes the resonant high-energy spontaneous bremsstrahlung of ultrarelativistic electrons in the pulsed fields of a nucleus and X-ray pulsar. Specific attention is given to the pulsed character of the field model. Under the resonant conditions the intermediate virtual electron within the electromagnetic field transforms into a real particle. As a result, the initial second-order process with accordance to the fine structure constant effectively splits into two first-order effects: the stimulated Compton process and the field-assisted scattering of an electron on a nucleus. In this research we obtain the resonant differential cross-sections with registration of frequency and radiation angle of a hard gamma-quantum. To summarize, the resonant differential cross-section of the effect within the external pulsed electromagnetic field of X-ray pulsar significantly exceeds the corresponding cross-section without an external field.

Highlights

Previous astronomical investigations explored the emissions of ultrarelativistic electrons in the cosmic rays [1,2] from neutron stars and magnetars
It is important to underline that the constructed theoretical model of the phenomenon simulates the pulsed character of the external field
The resonant second-order bremsstrahlung process transforms into two first-order processes with respect to the fine structure constant: the external pulsed field-stimulated Compton-effect with simultaneous absorption of r gamma-quanta and neutron star field-assisted scattering of an ultrarelativistic electron on a nucleus

Summary

Introduction

Previous astronomical investigations explored the emissions of ultrarelativistic electrons in the cosmic rays [1,2] from neutron stars and magnetars. The initial second-order process with respect to the fine structure constant in the wave field effectively splits into two first-order processes: the external X-ray field-stimulated Compton effect and the X-ray field-assisted Mott process. For such arrangement, the resonant kinematics determine both the frequency of the spontaneous photon, which significantly depends on the reaction channel, and the corresponding angles of emission of the spontaneous photon in correlation to the momenta of the initial or final electrons. It is important to underline, that the probability of the resonant channel

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