Zobrazeno 1 - 10
of 104
pro vyhledávání: '"K. Pisk"'
Autor:
Zoran Kaliman, K. Pisk
In this article we present the relativistic calculations, based on the QED theory, for double ionization of helium by the Compton scattering. In particular, we calculate the contribution of the spin–flip amplitude to the total cross section. Due to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29fd3b12d7cad0cedce4a83c11e3a903
https://www.bib.irb.hr/881907
https://www.bib.irb.hr/881907
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 580:43-45
We present theoretical results for double differential cross section d 2 σ / d Ω 1 d Ω 2 in the process of double ionization of Helium by high-energy Compton scattering. We discuss the energy and angular dependence of the cross section, as well as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30938950109ccd0f13e49317baeca9ed
https://doi.org/10.1016/j.nima.2007.05.036
https://doi.org/10.1016/j.nima.2007.05.036
Publikováno v:
Physics Letters A. 211:289-296
We examine the charge ( Z ) dependence of the nonrelativistic high energy limit for the double to total ionization ratio by Compton scattering of a photon, as well as by the photoeffect, utilizing our approach based on the impulse approximation or on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed95764b6d86c81db24580dc758074dd
https://doi.org/10.1016/0375-9601(95)00966-3
https://doi.org/10.1016/0375-9601(95)00966-3
Autor:
K. Pisk, Zoran Kaliman
Publikováno v:
Radiation Physics and Chemistry. 71:633-635
We present a theoretical framework for the calculations of Compton scattering on bound electrons, based on recoil-ion observables. We show the results for Compton cross sections on He-atom, with respect to the recoil-ion momentum. The validity and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30f748a1d246e2e067fa6b9089c4c374
https://doi.org/10.1016/j.radphyschem.2004.04.035
https://doi.org/10.1016/j.radphyschem.2004.04.035
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 49:235004
In this work we analyze the wave–particle aspects of radiation in (incoherent) Compton scattering in the radiation energy range from 2–100 keV. From the calculated cross sections of the scattering from the electron (positron), hydrogen and positr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2983c789440a239be7092d8c81bdf5b
https://doi.org/10.1088/0953-4075/49/23/235004
https://doi.org/10.1088/0953-4075/49/23/235004
Publikováno v:
Physical Review Letters. 73:790-793
Photoionization of two-electron systems is studied. The nonrelativistic impulse approximation is applied to treat the Compton ionization contributions. For asymptotically high energies this treatment formally reduces to the generalized shake theory a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3727897a74efc126c44cd0f2a8fe64e
https://doi.org/10.1103/physrevlett.73.790
https://doi.org/10.1103/physrevlett.73.790
The cross sections for Compton scattering from positronium are calculated in the range from 1 to 100 keV incident photon energy. The calculations are based on the ${A}^{2}$ term of the photon-electron or photon-positron interaction. Unlike in hydroge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c75b6c365050c8afca931e0904ca129
https://doi.org/10.1103/physreva.83.053406
https://doi.org/10.1103/physreva.83.053406
Publikováno v:
Physical Review A. 48:1134-1162
Compton scattering from bound electrons is studied within external field quantum electrodynamics and the independent-particle approximation (IPA), but without making use of any additional approximations, such as the impulse or incoherent-scattering f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09895eb9180ed943d02c83bd8d226d3d
https://doi.org/10.1103/physreva.48.1134
https://doi.org/10.1103/physreva.48.1134
Publikováno v:
Physical Review C. 47:47-55
We have reformulated the relativistic theory of internal bremsstrahlung in electron capture (IBEC) and developed a numerical code for calculating a transition amplitude for any initial atomic state. All relativistic as well as screening effects are i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94359cd993c814117baf5060659aedfc
https://doi.org/10.1103/physrevc.47.47
https://doi.org/10.1103/physrevc.47.47
We report new results of calculations for double ionization of helium by high energy Compton scattering. Our calculation is based on a recently developed perturbative approach, which describes the process in terms of two amplitudes: the shake off (SO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89eab8ca7376cc094fb51a9357d0ea1f
https://doi.org/10.1016/j.nima.2009.12.032
https://doi.org/10.1016/j.nima.2009.12.032