Single-electron detachment cross sections for 5–50-keVH−ions incident on helium, neon, and argon atoms

Absolute energy-resolved measurements of theH−+H→H2+e−Bruhns1, Kreckel2, Miller3 et al. 2010Phys. Rev. A331130View full textAdd to dashboardCite

“…where σ SED = (6.14 ± 0.38) × 10 −16 cm 2 was measured by [14] and σ DED = (5.46 ± 1.64) × 10 −17 cm 2 is the recommended cross section of [15]. With our experimental configuration SED creates fast H and DED fast H + .…”

“…As a result of the enhanced pressure and stripping in this third region, more neutrals are created through H − stripping downstream of the photodetachment region than upstream, giving δ > 1. Using the measured pressure readings in each section, their respective lengths, VAKLOOP pressure profile simulations [16,17], and the SED cross sections for H − on He [14] and H 2 [18], we calculate a factor δ = 7.2. Assuming an unrealistically large factor of 2 uncertainty in δ introduces a ±1% error in S for our results here.…”

“…This pattern of autotuning, profile measurements, data collection, and profile measurements was repeated until 80-100 iterations through the selected range for U f had been performed. (14). Also listed are each relevant symbol, the section where the term is discussed in detail, and typical values.…”

Isotope effect for associative detachment:H(D)−+H(D)→H2(Miller1, Bruhns2, Čı́žek3 et al. 2012Phys. Rev. A322240View full textAdd to dashboardCite

“…A small correction needs to be made for the unmeasured D + generated in the gas cell. For this we used the velocity matched H − cross sections from [17,18] for the required D − single and double electron detachment cross sections. The uncertainties in the detachment cross sections have an insignificant effect on the measured calibration.…”

Single-electron detachment cross sections for negative ions of transition elements colliding with gases

“…Even so, new experimental results continue to appear [7][8][9][10][11], especially for light elements in collisions with gases, such as H À + noble gases [4,12]. However, compared with these studies, research on electron detachment for negative ions of transition elements are rather scarce, even for collisions with noble gases.…”