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We estimate the dipole radiation emitted in fusion processes. We show that a classical bremsstrahlung approach can account for both the preequilibrium and the thermal photon emission. We give an absolute evaluation of the pre-equilibrium…

Nuclear Theory · Physics 2009-11-07 V. Baran , D. M. Brink , M. Colonna , M. Di Toro

Bremsstrahlung of photons emitted during the scattering of $\pi^{+}$-mesons off nuclei is studied for the first time. Role of interactions between $\pi^{+}$-mesons and nuclei in the formation of the bremsstrahlung emission is analyzed in…

Nuclear Theory · Physics 2018-12-05 Sergei P. Maydanyuk , Peng-Ming Zhang , Li-Ping Zou

Purpose: In this paper we investigated emission of bremsstrahlung photons in the scattering of protons off deuterons within the microscopic cluster models in a wide region of the beam energy from low energies up to 1.5 GeV. Methods:…

Nuclear Theory · Physics 2024-04-19 K. A. Shaulskyi , S. P. Maydanyuk , V. S. Vasilevsky

The first-order bremsstrahlung emission spectrum is $\alpha d\omega/\omega$ at zero temperature. If the radiation is emitted into a region that contains a thermal distribution of photons, then the rate is increased by a factor $1+N(\omega)$…

High Energy Physics - Phenomenology · Physics 2009-10-22 H. Arthur Weldon

Hard bremsstrahlung production in proton-proton collisions has been studied with the ANKE spectrometer at COSY-Juelich in the energy range of 353-800 MeV by detecting the final proton pair {pp}_s from the pp -> {pp}_s reaction with very low…

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…

High Energy Physics - Phenomenology · Physics 2016-09-06 V. N. Baier , V. M. Katkov

There has recently been interest in the role of inverse bremsstrahlung, the emission of photons by fast suprathermal ions in collisions with ambient electrons possessing relatively low velocities, in tenuous plasmas in various astrophysical…

Astrophysics · Physics 2009-10-31 Matthew G. Baring , Frank C. Jones , Donald C. Ellison

Bremsstrahlung emission of photons during nuclear reactions inside dense stellar medium is investigated in the paper. For that, a new model of nucleus is developed, where nuclear forces combine nucleons as bound system in dependence on deep…

Nuclear Theory · Physics 2024-09-23 Sergei P. Maydanyuk , Kostiantyn A. Shaulskyi

We present a calculation of neutrino pair bremsstrahlung due to electron-electron scattering in a relativistic degenerate plasma of electrons. Proper treatment of the in-medium photon propagator, i.e., inclusion of Debye screening of the…

High Energy Physics - Phenomenology · Physics 2015-06-25 Prashanth Jaikumar , Charles Gale , Dany Page

We present a fully relativistic calculation of the bremsstrahlung emitted by twisted electrons propagating in the field of bare heavy nuclei. The electron-nucleus interaction is accounted for to all orders in the nuclear binding strength…

Atomic Physics · Physics 2020-01-29 M. E. Groshev , V. A. Zaytsev , V. A. Yerokhin , V. M. Shabaev

Two methods based on bremsstrahlung were applied to the stable even Mo isotopes for the experimental determination of the photon strength function covering the high excitation energy range above 4 MeV with its increasing level density.…

Nuclear Experiment · Physics 2010-04-14 M. Erhard , A. R. Junghans , C. Nair , R. Schwengner , R. Beyer , J. Klug , K. Kosev , A. Wagner , E. Grosse

The processes of lepton-nucleon scattering, including ones with both polarized beams, at high energy provide relevant information about interaction and particles structure, allowing to analyze nucleon spin structure. As energy and…

High Energy Physics - Phenomenology · Physics 2007-08-21 S. N. Sevbitov , T. V. Shishkina

A highly intense femtosecond laser pulse incident on a plasma target of supercritical density, gives rise to reflected high-order harmonics of the laser frequency. The radiation model adopted here considers Brunel electrons -those…

Plasma Physics · Physics 2015-06-19 R. Ondarza-Rovira , T. J. M. Boyd

We calculate differential distributions for the $p p \to p p \gamma$ reaction at the LHC energy $\sqrt{s} = 14$ TeV. We consider diffractive classical bremsstrahlung mechanisms including effects of non point-like nature of protons. In…

High Energy Physics - Phenomenology · Physics 2015-06-15 Piotr Lebiedowicz , Antoni Szczurek

The photon production rate from a chemically equilibrating quark-gluon plasma likely to be produced at RHIC (BNL) and LHC (CERN) energies is estimated taking into account bremsstrahlung. The plasma is assumed to be in local thermal…

High Energy Physics - Phenomenology · Physics 2016-09-06 Munshi G. Mustafa , Markus H. Thoma

We present a model of coherent Bremsstrahlung emission from the compression phase of relativistic heavy ion collisions based on a hydrodynamical description of the collision process. The decceleration of the matter through a shock front,…

High Energy Physics - Phenomenology · Physics 2007-05-23 C. Bertulani , L. Mornas , U. Ornik

The production of nuclear bremsstrahlung photons (E$_{\gamma}>$ 30 MeV) has been studied in inclusive and exclusive measurements in four heavy-ion reactions at 60{\it A} MeV. The measured photon spectra, angular distributions and…

We calculate the emission of bremsstrahlung from lead and argon ions in A Fixed Target ExpeRiment (AFTER) that uses the LHC beams. With nuclear charges of $Ze$ equal $208$ and $18$ respectively, these ions are accelerated to energies of $7$…

Nuclear Experiment · Physics 2015-03-27 Rune E. Mikkelsen , Allan H. Sørensen , Ulrik I. Uggerhøj

Radiative electron-proton scattering is studied in peripheral kinematics, where the scattered electron and photon move close to the direction of the initial electron. Even in the case of unpolarized initial electron the photon may have a…

High Energy Physics - Phenomenology · Physics 2014-11-20 E. A. Kuraev , Yu. M. Bystritskiy , M. Shatnev , E. Tomasi-Gustafsson

We discuss the diffractive bremsstrahlung of a single photon in the $pp \to pp \gamma$ reaction at LHC energies and at forward photon rapidities. We compare the results for our standard approach, based on QFT and the tensor-Pomeron model,…

High Energy Physics - Phenomenology · Physics 2024-03-27 Piotr Lebiedowicz , Antoni Szczurek , Otto Nachtmann