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. Bremsstrahlung (BS) imaging during radioembolization (RE) confirms the deposition of radiotracer in hepatic/extrahepatic tumors. The aim of this study is to demonstrate (32)P images and to optimize the imaging parameters. Materials and Methods. Thirty-nine patients with variable types of hepatic tumors, treated with the intra-arterial injection of (32)P, were included. All patients ...

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 (...

Neutrino-pair bremsstrahlung by relativistic degenerate electrons in a neutron-star crust at densities 10 9 g cm ?3 < < 1:5 10 14 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 electron-phonon scattering (the phonon contribution) and Bragg diiraction (the static-lattice contribution) in...

We compute the total radiated momentum carried by gravitational waves during scattering of two spinless black holes at lowest order in Newton's constant, $\mathcal{O}({G}^{3})$, and all orders velocity. By analytic continuation into bound state regime, we obtain $\mathcal{O}({G}^{3})$ energy loss elliptic orbits. This provides an essential step toward complete understanding third-post-Minkowski...

X-ray emission by sparks implies bremsstrahlung from a population of energetic electrons, but the details of this process remain a mystery. We present detailed statistical analysis of X-ray spectra detected by multiple detectors during sparks produced by 1 MV negative high-voltage pulses with 1 μs risetime. With over 900 shots, we statistically analyze the signals, assuming that the distributio...