Tseng's calculations of low energy pair production

Pratt, R. H.

doi:10.1016/j.radphyschem.2005.09.006

Cited by 3 publications

(2 citation statements)

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“…For some recent developments in pair production research, attention is here called to a special topical issue of Radiation Physics and Chemistry edited by Bergstrom (2006) including an over-all historical pair production review by Hubbell (2006), an update by Pratt (2006) on Tseng's low-energy calculations, intermediate-energy distorted wave Born approximation calculations by Sud and Sharma (2006), internal-source absolute pair production cross section measurements by Avignone (2006), the pair production channel in atomic processes by Belkacem and Sørensen (2006), extreme high energy pair production (10 GeV to 10 ZeV) by Klein (2006), relativistic positronium physics by Olsen (2006), and pair production of arbitrary spin particles by electromagnetic fields, by Kruglov (2006).…”

Section: Electron-positron Pair Productionmentioning

confidence: 99%

Review and history of photon cross section calculations

Hubbell

2006

Phys. Med. Biol.

128

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Photon (x-ray, gamma-ray, bremsstrahlung) mass attenuation coefficients, mu/rho, are among the most widely used physical parameters employed in medical diagnostic and therapy computations, as well as in diverse applications in other fields such as nuclear power plant shielding, health physics and industrial irradiation and monitoring, and in x-ray crystallography. This review traces the evolution of this data base from its empirical beginnings totally derived from measurements beginning in 1907 by Barkla and Sadler and continuing up through the 1935 Allen compilation (published virtually unchanged in all editions up through 1971-1972 of the Chemical Rubber Handbook), to the 1949 semi-empirical compilation of Victoreen, as our theoretical understanding of the constituent Compton scattering, photoabsorption and pair production interactions of photons with atoms became more quantitative. The 1950s saw the advent of completely theoretical (guided by available measured data) systematic compilations such as in the works of Davisson and Evans, and by White-Grodstein under the direction of Fano, using mostly theory developed in the 1930s (pre-World War II) by Sauter, Bethe, Heitler and others. Post-World War II new theoretical activity, and the introduction of the electronic automatic computer, led to the more extensive and more accurate compilations in the 1960s and 1970s by Storm and Israel, and by Berger and Hubbell. Today's mu/rho compilations by Cullen et al, by Seltzer, Berger and Hubbell, and by others, collectively spanning the ten decades of photon energy from 10 eV to 100 GeV, for all elements Z= 1 to 100, draw heavily on the 1970s shell-by-shell photoabsorption computations of Scofield, the 1960s coherent and incoherent scattering computations of Cromer et al, and the 1980 computations of electron-positron pair and triplet computations of Hubbell, Gimm and Øverbø, these names being representative of the vast legions of other researchers whose work fed into these computations.

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Section: Electron-positron Pair Productionmentioning

confidence: 99%

Review and history of photon cross section calculations

Hubbell

2006

Phys. Med. Biol.

128

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“…These calculations are performed by using essentially the same procedure as for the bremsstrahlung process, namely, using the multipole expansion for the photon and the partial-wave expansion in equation (A.13) of the distorted plane waves of the electron and the positron. A review of later work on partial-wave calculations of pair production in screened Coulomb fields has been published by Pratt (2006). Partial-wave calculations are numerically difficult and feasible only for photons with energies up to about 10m e c 2 , because of the slow convergence of the multipole and partial-wave series.…”

Section: Electron-positron Pair Productionmentioning

confidence: 99%

Overview of physical interaction models for photon and electron transport used in Monte Carlo codes

2009

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The physical principles and approximations employed in Monte Carlo simulations of coupled electron–photon transport are reviewed. After a brief analysis of the assumptions underlying the trajectory picture used to generate random particle histories, we concentrate on the physics of the various interaction processes of photons and electrons. For each of these processes we describe the theoretical models and approximations that lead to the differential cross sections employed in general-purpose Monte Carlo codes. References to relevant publications and data resources are also provided.

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