Center for Transport Theory and Mathematical Physics
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Browsing Center for Transport Theory and Mathematical Physics by Author "Zweifel, Paul F."
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- Collided-flux-expansion method for the transport of muonic deuterium in finite mediaRondoni, Lamberto; Zweifel, Paul F. (American Physical Society, 1991-07)Transport of muonic deuterium atoms in a slab of thickness d filled with a molecular deuterium gas is described by means of the multiple-collision expansion in the framework of a time-dependent theory. The relevant expressions for the emerging flux are derived. Numerically generated results are presented for several different cases, some of which are under experimental investigation. A justification of the approximations made in a previous work is given.
- Diffusion of muonic atomsRusjan, Edmond; Zweifel, Paul F. (American Physical Society, 1988-10)Transport of muonic hydrogen and deuterium atoms in gaseous hydrogen and deuterium is studied in the diffusion approximation and by means of the multiple-collision expansion. The diffusion coefficient is derived. Numerical results of the time-dependent problem in slab geometry are presented for a number of initial energies, temperatures, and pressures.
- Scattering kernels for the muon diffusion equationRusjan, Edmond; Zweifel, Paul F. (American Physical Society, 1988-08)Diffusion of muonic hydrogen atoms in gaseous hydrogen is studied. Scattering kernels are derived from the kinematics of an inelastic binary collision. The effect of rotations of the hydrogen molecules is treated by defining and computing an effective inelastic energy transfer Qeff. The Doppler effect is taken into account by averaging the cross sections over the Maxwellian velocity distribution of the target molecules.