No abstract

No abstract

The total electron loss, target ionization, and simultaneous projectile-target ionization are measured for He projectiles on H2 and He in the energy range of 1.5 -4.0 MeV. The experimental data are in good agreement with calculations based on the independent-particle model including screening, antiscreening, and target-ionization probabilities as well as second-order mechanisms for the simultaneous projectile-target ionization.PACS number(s): 34.50.Fa

M-subshell ionization cross sections of Au, Pb, Bi, and U by proton bombardment were obtained over the projectile range 0.3 -4.0 MeV. X rays were detected by Si(Li) spectroscopy. At least one characteristic radiative transition line for each M subshell was isolated and measured. Radiative and nonradiative branching ratios were taken from theoretical calculations of Bhalla and McGuire. Our total x-ray-production cross sections are compared with the measurements of other authors. Comparison of our scaled subshell ionization cross sections with calculations in the plane-wave Born approximation shows, in general, good agreement.Uncertainties in fluorescence yields and in super -Coster-Kronig coefficients can introduce great imprecision in some experimentally determined subshell ionization cross sections.

No abstract

No abstract

No abstract

No abstract