Electron-impact ionization of hydrogen-like iron ions

Abstract

Electron-impact ionization cross sections have been determined for hydrogenlike iron ions at selected electron energies between 1.45 and 4.3 times the threshold energy. The cross sections were obtained by measuring the equilibrium ionization balance in an electron beam ion trap. This ionization balance is obtained from x-ray measurements of radiative recombination into the K-shell of hydrogen-like and bare iron ions. The measured cross sections are compared with distorted-wave calculations and several semiempirical formulations.

Plasma-Related Atomic Physics with an Electron Beam Ion Trap

“…Collision processes, such as excitation [38] and ionization [39,40] can thus be studied by observing emission from an EBIT or charge state distribution in an EBIT. In particular, resonant processes, such as dielectronic recombination (DR) can be studied efficiently by observing the dependence on electron energy.…”

Electron impact ionization of hydrogen-like molybdenum ions

“…Marrs et al [2] obtained the intensity ratios at N 0 = 0 by extrapolation, using the results obtained at various neutral gas densities. O'Rourke et al [13] measured the intensity ratios at various neutral gas densities and also at various electron beam currents. They extrapolated the ratio at N 0 = 0 and I e = ∞ so that the extrapolated values took the same value for both the measurements.…”

“…In fact Marrs et al [2] and O'Rourke et al [13] used the pressure values at the gas injector, assuming that they were proportional to the value in the trap. Furthermore, sufficient coolant gas can be introduced into the trap every time, resulting in higher x-ray intensity.…”

Electron loss from hydrogen-like highly charged ions in collisions with electrons, protons and light atoms

“…There exists a number of experimental and theoretical data on the total cross section for electron loss from hydrogenlike HCIs in collisions with electrons [6][7][8][9][10][11][12][13]. Besides, calculations are available for electron loss from such ions in collisions with various bare nuclei [14,15] including protons.…”