Effective Compton Cross Sections in a Hot Plasma

Electroweak Effective Charges and their relation to Physical Cross Sections

In quantum electrodynamics with fermions f = e, μ . . . , knowledge of the vacuum polarization spectral function determined from the tree level ee → ff cross sections, together with a single low energy measurement of the fine structure constant α, enables the construction of the one–loop effective charge αeff(q ) for all q. It is shown how an identical procedure can be followed in the electrowe...

Exclusive and inclusive cross sections for Compton scattering from H and He

Absolute inclusive and exclusive cross sections for ionization of H and He by Compton scattering are presented and analyzed. The exclusive cross section for ionization of one electron, leaving the second electron in the ground state, is 20% smaller for H than for He. Furthermore, the exclusive cross section for ionization with excitation to the first excited state is seven times larger for H th...

Charge Exchange Cross Sections for the Io Plasma Torus

An impact parameter method for calculating cross sections as a function of incident ion energy is used in conjunction with an improved exchange energy formulation to update several of the charge exchange cross sections currently used in Io plasma torus modeling. New cross sections for S + + S 2 + • S 2 + + S + and Na + on neutral targets, useful in analyzing the fast Na jets observed at Io, are...

Inverse Compton Scattering in Mildly Relativistic Plasma

We investigated the effect of inverse Compton scattering in mildly relativistic static and moving plasmas with low optical depth using Monte Carlo simulations, and calculated the Sunyaev-Zel’dovich effect in the cosmic background radiation. Our semi-analytic method is based on a separation of photon diffusion in frequency and real space. We use Monte Carlo simulation to derive the intensity and...

Laser-electron Compton Interaction in Plasma Channels