0° binary encounter electron production in 30-MeVOq++H2

Elastic resonant and nonresonant differential scattering of quasifree electrons fromB4+(1s)andBenis1, Zouros2, Gorczyca3 et al. 2004Phys. Rev. ASelf Cite3232011View full textAdd to dashboardCite

“…Even in the case of many-electron targets such as Ne, Ar, Xe, and Kr [81], as well as complicated molecules [82], in which electrons from different shells can contribute with different Compton profiles and binding energies, the ESM has also been shown to be a good approximation. Earlier studies of the Coulomb or BEe contributions in collisions with nonbare or clothed ions have also shown the validity of the ESM [83,84]. The nonresonant part of the DDCS from the sum of all three terms for 180°is known to increase with decreasing q [44], an effect first explained in terms of classical scattering glory effects [85] and consistent with the full quantal R-matrix treatment provided by the above Eqs.…”

“…Thus, the overall absolute DDCS error can be expected to be around 10-15% [47], which explains the very nice agreement seen between theory and experiment throughout the spectrum. The absolute DDCSs obtained were finally transformed to the projectile rest frame according to the kinematic transformations [84] = ͓ ͱ L − ͱ t͔ 2 ,…”

“…Traditionally, in BEe calculations, the DDCS is obtained through the Coulomb scattering formula for a bare ion [utilized within the IA, i.e., Eq. (3)], multiplied by an overall enhancement factor R to account for any ionic structure [84]. Given the simplicity of the calculation and the accuracy of the result, enhancement factors become important information for absolute efficiency determination.…”

Evidence for Fermi-Shuttle Ionization in Intermediate VelocityC++XeCollisions

“…The C K-Auger electrons show up as a circle centered at p. The P process shows only a moderate enhancement at forward angles. This deviation from the 1st-Born results is due to the non-Coulomb projectile field [18,19]. The P-T process is clearly observable at backward angles.…”

Investigation of electron capture in swift C4+ (1s2s 3S) collisions with gas targets using a zero-degree Auger projectile spectroscopy apparatus built with the L45 beam line at the ‘Demokritos’ 5.5MV tandem accelerator

“…The three regimes are defined as the adiabatic or slow (V p v e ) regime, the intermediate (V p ≈ v e ) regime and the high-energy or fast (V p v e ) [63] regime. As a point of reference, the electron velocities of He (or H 2 ) are 3.73 mm/ns (3.35 mm/ns for H 2 ), 0.073 MeV/u (or 0.058 MeV/u) and 1.70 au (or 1.53 au) [64], while the projectile velocities of this thesis are in the range of 9.82-15.52 mm/ns (0.5-1.25 MeV/u or 4.49-7.09 au). One of the first methods developed for charge transfer and ionization calculations was the Classical Trajectory Monte Carlo (CTMC) method [65], applicable in the intermediate energy regime.…”