We have performed extensive close-coupling calculations to obtain total impact ionization cross sections of He atoms by antiprotons at energies from 1 keV to 300 keV by expanding the time-dependent two-electron wave functions in terms of helium eigenstates. The stability of the calculated ionization probabilities and total ionization cross sections with respect to the choice of basis functions ...

Abstract Stripping cross sections in nitrogen have been calculated using the classical trajectory approximation and the Born approximation of quantum mechanics for the outer shell electrons of 3.2GeV I− and Cs ions. A large difference in cross section, up to a factor of six, calculated in quantum mechanics and classical mechanics, has been obtained. Because at such high velocities the Born appr...

Published experimental photon and electron impact ionization cross sections of CH4 have been reviewed and analyzed. Absolute partial ionization oscillator strengths (fij) for CH4 , CH + 3 , CH + 2 , CH , H and H2 have been obtained. Electron impact ionization cross sections are recommended based on agreement between the oscillator strength values derived from photoionization and electron impact...

Penning ionization of iodomethane (CH3I) and diiodomethane (CH2I2) upon collision with metastable He(2S) atoms was studied by collision-energy/electron-energy resolved two-dimensional Penning ionization electron spectroscopy (2D-PIES) over a wide range of collision energies (20 – 350 meV). Collision energy dependence of partial ionization cross sections (CEDPICS) indicates that the interaction ...

Recent experimental results will be reviewed for the atomic (e,2e) ionisation process at incident energies in the 'low energy' region, from a few eV to about lO0eV above threshold. This region is particularly interesting because it embodies all the possible complexities that can be present in the electron-impact ionisation process, such as distortions, multiple scattering, correlations, postcol...

The calculation of total integral cross sections for electron-impact ionization of atoms and atomic ions has, in the last 8 years, greatly benefited from the development of several nonperturbative methods, which generally show very good agreement with each other and with experiment. For the electron-impact ionization of hydrogen, the convergent close-coupling @1#, the hyperspherical close-coupl...

Abstract. Application of the convergent close-coupling (CCC) method to electronimpact ionization of the ground state of atomic hydrogen is considered at incident energies of 15.6, 17.6, 20, 25, 27.2, 30, 54.4, 150 and 250 eV. Total through to fully differential cross sections are presented. Following the analysis of Stelbovics [submitted to Phys. Rev. Lett. (http://xxx.lanl.gov/abs/physics/9905...

Thin-walled structures like crash boxes may be used as energy absorption members in automotive chassis. There have been many studies addressing the behaviors of energy absorption members on frontal crash. These researches have attempted to predict the energy absorption and maximum impact load in shell structures. The energy absorption and maximum impact load depend on many parameters including ...

gain of enough knowledge on how to reduce mechanical damages is indispensable in developing fresh fruit handling as well as post harvest systems. this research was performed to determine and compare the susceptibility of five apple varieties to impact loads in khorasan region. five apple varieties of khorasan region (aroos, abbasi, yellow lobnani, red lobnani and golshahi) were loaded by two im...