High-energy expansion of Coulomb corrections to the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>photoproduction cross section

Lee, Roman N.; Milstein, A. I.; Strakhovenko, V. M.

doi:10.1103/physreva.69.022708

Cited by 30 publications

(12 citation statements)

References 20 publications

(31 reference statements)

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“…This was convincingly demonstrated in the case of photon scattering by a Coulomb field, the so-called Delbrück scattering [2,3], and for Coulomb field-induced photon splitting [4,5]. The cross section of the Bethe-Heitler process exact in Zα has also been extensively studied [6][7][8][9] as has the process of e + -e − production in heavy ion collisions [10,11]. Strong electromagnetic fields are also produced in the laboratory by powerful lasers.…”

Section: Introductionmentioning

confidence: 92%

Effect of a strong laser field on electron-positron photoproduction by relativistic nuclei

et al. 2010

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We study the influence of a strong laser field on the Bethe-Heitler photoproduction process by a relativistic nucleus. The laser field propagates in the same direction as the incoming high-energy photon, and it is taken into account exactly in the calculations. Two cases are considered in detail. In the first case, the energy of the incoming photon in the nucleus rest frame is much larger than the electron's rest energy. The presence of the laser field may significantly suppress the photoproduction rate at soon-available values of laser parameters. In the second case, the energy of the incoming photon in the rest frame of the nucleus is less than and close to the electron-positron pair-production threshold. The presence of the laser field allows for the pair-production process, and the obtained electron-positron rate is much larger than in the presence of only the laser and the nuclear field. In both cases, we have observed a strong dependence of the rate on the mutual polarization of the laser field and on the high-energy photon, and the most favorable configuration is with laser field and high-energy photon linearly polarized in the same direction. The effects discussed are, in principle, measurable with presently available proton accelerators and laser technology.

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Section: Introductionmentioning

confidence: 92%

Effect of a strong laser field on electron-positron photoproduction by relativistic nuclei

et al. 2010

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“…Then, following three studies of intermediate-energy pair cross sections for selected heavy elements using distorted wave Born approximation (DWBA) by Sud and Sharma (1987), Wright et al (1987) and Sud andSoto Vargas (1991, 1994), Selvaraju et al (2001) used DWBA to compute and tabulate differential (in positron energy) and total k n values for six elements H to U over the intermediate photon energy range 5.0-10.0 MeV. Attention is called also to the work of Lee et al (2004) in this same energy region, in which screening effects on the Coulomb correction are examined using a next-order expansion in inverse energy, and some results presented.…”

Section: Some Further Theoretical Work Beyond Hgø (1980)mentioning

confidence: 99%

Electron–positron pair production by photons: A historical overview

Hubbell

2006

Radiation Physics and Chemistry

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This account briefly traces the growth of our theoretical and experimental knowledge of electron-positron pair production by photons, from the prediction of the positron by Dirac [1928a can interact with the Coulomb field of an atomic nucleus to be transformed into an electron-positron pair, the probability increasing with increasing photon energy, up to a plateau at high energies, and increasing with increasing atomic number approximately as the square of the nuclear charge (proton number). This interaction can also take place in the field of an atomic electron, for photons of energy in excess of 4m e c 2 (2.044 MeV), in which case the process is called triplet production due to the track of the recoiling atomic electron adding to the tracks of the created electron-positron pair. The last systematic computations and tabulations of pair and triplet cross sections, which are the predominant contributions to the photon mass attenuation coefficient for photon energies 10 MeV and higher, were those of Hubbell et al. [Pair, triplet, and total atomic cross sections (and mass attenuation coefficients) for 1 MeV-100 GeV photons in elements Z ¼ 1-100. J. Phys. Chem. Ref. Data 9, 1023Data 9, -1147, from threshold (1.022 MeV) up to 100 GeV, for all elements Z ¼ 1-100. These computations required some ad hoc bridging functions between the available low-energy and high-energy theoretical models. Recently (1979Recently ( -2001, Sud and collaborators have developed some new approaches including using distorted wave Born approximation (DWBA) theory to compute pair production cross sections in the intermediate energy region (5.0-10.0 MeV) on a firmer theoretical basis. These and other recent developments, and their possible implications for improved computations of pair and triplet cross sections, are discussed. Published by Elsevier Ltd.

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“…In the Coulomb case Bethe and Maximon (1954) obtained the high energy limit for all Z, using Sommerfeld-Maue wave functions, and the screening modifications of the high energy limit were also later obtained. [We note that in a very recent paper Lee et al (2004) have obtained 1/energy corrections to this high energy result in the Coulomb case, which they found useful as low as 10 MeV. ]…”

Section: Previous Workmentioning

confidence: 91%

Tseng's calculations of low energy pair production

Pratt

2006

Radiation Physics and Chemistry

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High-energy expansion of Coulomb corrections to thee+e−photoproduction cross section

Cited by 30 publications

References 20 publications

Effect of a strong laser field on electron-positron photoproduction by relativistic nuclei

Effect of a strong laser field on electron-positron photoproduction by relativistic nuclei

Electron–positron pair production by photons: A historical overview

Tseng's calculations of low energy pair production

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