We have investigated the role of the cyclotron emission associated to cosmic magnetic fields on the evolution of CMB spectral distortions by considering the contributions by spontaneous and stimulated emission and by absorption in the computation of the photon and energy injection rates. These cyclotron emission rates have been numerically compared with those of the relevant radiative processes...

Context. Observations of X-Ray sources harbouring a black hole and an accretion disc show the presence of at least two spectral components. One component is black-body radiation from an optically thick standard accretion disc. The other is produced in a optically thin corona and usually shows a powerlaw behaviour. Electron-proton (ep) bremsstrahlung is one of the contributing radiation mechanis...

Radiation from high energy electrons in an oriented crystal can be considered in a frame of the quasiclassical operator method which appears to be a most satisfactory approach to the problem. Under some quite generic assumptions the general expression is derived for the probability of circularly polarized photon emission from the longitudinally polarized electron in oriented crystal. The partic...

Background: As bremsstrahlung photon beam fluence is important parameter to be known in a photonuclear reaction experiment as the number of produced particle is strongly depends on photon fluence. Materials and Methods: Photon production yield from different thickness of aluminum target has been estimated using artificial neural network (ANN) model. Target thickness and incoming electr...

Neutrino-pair bremsstrahlung by relativistic degenerate electrons in a neutron-star crust at densities 109 g cm −3 <∼ ρ <∼ 1.5 × 1014 g cm−3 is analyzed. The processes taken into account are neutrino emission due to Coulomb scattering of electrons by atomic nuclei in a Coulomb liquid, and electronphonon scattering (the phonon contribution) and Bragg diffraction (the static-lattice contribution)...

This paper presents the first study that uses the GEometry ANd Tracking 4 (GEANT4) toolkit to do quantitative comparisons with other modeling results related to the production of terrestrial gamma ray flashes and high-energy particle emission from thunderstorms. We will study the relativistic runaway electron avalanche (RREA) and the relativistic feedback process, as well as the production of b...

There has been an increased interest in 165Dy radiossynovectomy, which emits relatively high-energy (> 1 MeV) beta rays. The production of in vivo bremsstrachlung radiation hazards warrants evaluation. The bremsstrahlung component of the decay scheme of 165Dy has been traditionally ignored in internal dosimetry calculations. We have estimated the bremsstrahlung dose of 165Dy distributed in musc...

Abstract. We report the results of extracting the hard X-ray continuum spectrum of Cas A SNR from RXTE/PCA Target of Opportunity (TOO) observations and CGRO/OSSE observations. The data can rule out the single thermal bremsstrahlung model for Cas A continuum between 2 and 150 keV. The single power law model gives a mediocre fit (∼5%) to the data with a power-law index, Γ = 2.94±0.02. A model wit...

The bremsstrahlung power generated in the BTH and undulator and reaching the FEE has been simulated with the FLUKA [1] intra-nuclear cascade code. Calculations contain a detailed description of all 33 segments, quadrupoles, collimators, dump systems and surrounding walls and halls. Three bremsstrahlung sources are surveyed. The first one describes the photons arising from the interception of th...

BACKGROUND the characteristics of (90)Y, suitable for therapy, are denoted by the lack of γ-emission. Alternative methods, using analogues labelled with (111)In or (86)Y, are generally applied to image (90)Y-conjugates, with some inevitable drawbacks. New generation SPECT/CT image systems offer improved Bremsstrahlung images. The intent of this brief communication is to show that high quality (...