نتایج جستجو برای: bremsstrahlung radiation
تعداد نتایج: 239834 فیلتر نتایج به سال:
The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the polarized bremsstrahlung radiation induced by a polarized electron beam in a high-Z target. Positron polarization up to 82% have been measured for an ...
Scattering of primary beam electrons off of residual gas molecules or blackbody radiation photons in the NLC main linac has been identified as a potential source of beam haloes which must be collimated in the beam delivery system. We consider the contributions from four scattering mechanisms: inelastic thermal-photon scattering, elastic beam-gas (Coulomb) scattering inelastic beam-gas (Bremsstr...
We show that static sources coupled to a massless scalar eld in Schwarzschild spacetime give rise to emission and absorption of zero-energy particles due to the presence of Hawking radiation. This is in complete analogy with the description of the bremsstrahlung by a uniformly accelerated charge from the coaccelerated observers' point of view. The response rate of the source is found to coincid...
We examine the conditions imposed on the vertical structure of accretion discs for them to exist. We find that a wind powered by a thermal instability exists in all discs with certain opacity laws. We find that for discs dominated by bremsstrahlung radiation, an inner hole develops below a certain accretion rate, and that for very low accretion rates, discs may not form at all. The consequences...
A new dynamic is identified between dark matter and nuclei. Nuclei accelerated to MeV energies by the internal potential of composite can undergo nuclear fusion. This effect arises in simple models made heavy fermions bound a light scalar field. Cosmologies detection prospects are explored for composites that catalyze reactions underground detectors stars, including bremsstrahlung radiation fro...
The state vector evolution in the interaction of measured pure state with the collective quantum system or the field is analyzed in a nonperturbative QED formalism. As the model example the measurement of the electron final state scattered on nucleus or neutrino is considered. The produced electromagnetic bremsstrahlung contains the unrestricted number of soft photons resulting in the total rad...
We present accurate analytic fitting formulae which summarize the results of the recent calculation by Nozawa, Itoh & Kohyama on the relativistic thermal bremsstrahlung Gaunt factor for the intracluster plasma. The fitting is carried out for 1≤ Zj ≤ 28, 6.0 ≤ log10 T [K] ≤ 8.5,−4.0 ≤ log10(h̄ω/kBT ) ≤ 1.0, where Zj is the charge number of the ion, T is the temperature, and ω is the angular frequ...
We have studied the production of muon pairs with invariant masses from 1 to 4 GeV by 20.5 GeV bremsstrahlung radiation. The invariant mass distribution has' a large deviation from the expected Bethe-Heitler shape which we attribute to the Q(3.1 GeV). We determine the $(3.1 GeV) photoproduction cross section to be 1 3.7 + 2.2 1.5 nb at an average photon energy of.18 GeV. (Submitted to Physics L...
The method of zero range potential (ZRP) for one-electron problems is reviewed. In the absence of an external electromagnetic field, the notion of a ZRP is introduced from different points of view and for an arbitrary dimension of space. Then, three-dimensional problems of motion of an electron in the field of several ZRPs and laser radiation are studied. Exact wave functions for the processes ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید