Theory of the Interaction of Radiation with Biomolecules by John R. Sabin

By John R. Sabin

Advances in Quantum Chemistry provides surveys of present advancements during this swiftly constructing box that falls among the traditionally tested components of arithmetic, physics, chemistry, and biology. With invited stories written via prime foreign researchers, each one proposing new effects, it offers a unmarried automobile for following growth during this interdisciplinary sector.

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Air is commonly adopted as a reference radiological material and usually fills the ionization chambers in which some radiation detectors are based. The interest of tissue in these fields is obvious. Only data for these two materials are implemented in the current version of the code. We provide in this section a detailed description of the new processes is presented. Some representative cases of the tests performed to validate the code are also presented and comparisons with a reliable Monte Carlo code are discussed.

Once the corresponding δl phase shifts are obtained for the above potential, the elastic differential dσ/dΩ and total absorption σtot (E) cross sections result from their well-known partialwave and optical theorem expressions f (θ ) = 1 2ik lmax (2l + 1) e2iδl − 1 Pl (cos θ ), dσ 2 = f (θ ) , dΩ σel (E) = σtot (E) = (2) l=0 4π k2 (3) lmax (2l + 1) sin2 δl , (4) l=0 4π Im(fθ=0 ). k (5) A. Muñoz et al. 26 The lmax limit in (2) was chosen in each case to ensure a convergence of the calculations within 1%, and phase shifts corresponding to l values above l = 60 were extrapolated by the usual effective-range formula [23].

In the energy range considered here, 10–10000 eV, photons interacts, nearly 100%, ionising the target via photoelectric effect, producing a secondary electron with almost the same energy of the primary photon except for its binding energy. Calculated photoelectric interaction data are available for most of target of interest [11], being their reliability confirmed by experiments and simulations. Therefore we will focus our calculations on the electron scattering by molecules at intermediate and high energies.

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