Results 251 to 260 of about 2,260 (296)
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PRODUCTION ENGINEERING OF PROJECTILE, HE, 107-MM, XM502
1966Abstract : Notice was received that the XM570 (BMC) will be the contractual round. Cylinders were made from high carbon, high phosphorus steel bar. These and cylinders from W1 tool steel were sent to a subcontractor for heat treatment. 52100 steel cylinders were heat treated to replace items inadequately heat treated during November 1965. Metallurgical
E. J. McElliott, J. O. Vining
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Z2 scaling and effective Z of the projectile in H2+, He+Ar collisions
Physics Letters A, 1982Abstract The screening effect of the electron in the case of H2+ and He+ projectiles was studied in the 0.8–2.0 MeV/amu impact energy region by measuring the spectra of ejected electrons for emission angles from 0° to 60°.
Á. Kövér +6 more
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Simultaneous projectile and target ionization in He++ Ne collisions
Journal of Physics B: Atomic, Molecular and Optical Physics, 2001Cross sections for single and multiple ionization of the target atom with simultaneous ionization of the projectile have been measured for 1-4 MeV collisions of He+ with Ne. The observations are interpreted using the n-body classical trajectory Monte Carlo method. The 11-body calculations include the L-shell electrons of the Ne and the K-shell electron
J Fiol +4 more
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Chinese Physics B, 2015
The four-body Coulomb–Born distorted wave approximation is applied to investigate the integral as well as projectile angular-differential cross sections for single-electron capture in the collision of energetic singly positive charged helium ions with helium atoms in their ground states. The formalism satisfies the correct boundary conditions.
Ebrahim Ghanbari-Adivi, Hoda Ghavaminia
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The four-body Coulomb–Born distorted wave approximation is applied to investigate the integral as well as projectile angular-differential cross sections for single-electron capture in the collision of energetic singly positive charged helium ions with helium atoms in their ground states. The formalism satisfies the correct boundary conditions.
Ebrahim Ghanbari-Adivi, Hoda Ghavaminia
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Physical Review A, 1993
The contribution of excited metastable He projectiles to the production of the forward electron cusp peak has been measured for bombardment of Ar by 400-keV neutral He atoms using the technique of collisional quenching to control the metastable fraction of the beam.
, Kuzel +6 more
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The contribution of excited metastable He projectiles to the production of the forward electron cusp peak has been measured for bombardment of Ar by 400-keV neutral He atoms using the technique of collisional quenching to control the metastable fraction of the beam.
, Kuzel +6 more
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Effect of Projectile Charge State on Electron Emission Spectra from He Atom
Brazilian Journal of Physics, 2019The single ionization of He atom by the impact of highly charged dressed projectile nucleus is investigated by applying the three-body formalism of three-Coulomb wave (3CW) model and the first Born approximation (FBA). In the 3CW formalism, the interaction between the dressed projectile and the active electron is represented by a model potential ...
S. Halder +3 more
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Differential charge state fractions of He following ionization by fast H− projectiles
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1989Abstract The differential charge state fractions of He ions produced in ionization by fast H− projectiles have been measured at projectile scattering angles between 0.25 and 1.59 mrad and an impact energy of 1.0 MeV. These charge state fractions have been measured for each of the possible final charge states of the H− projectile (H−, H and p ...
J.P. Giese, E. Horsdal
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Experimental study of the beam-foil excitation mechanisms using fast He+ projectiles
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1991Radiative decays of excited He+ (4→3) ions emerging from thin carbon foils have been observed for a range of 25–600 keV/u projectile velocities in charge exchange equilibrium and non-equilibrium situations, respectively. A picture involving various excitation mechanisms responsible for the formation of these He+ (n = 4) excited ions explains ...
Clouvas, A. +7 more
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Dissociative ionization of N2O produced by 1 MeV H+, He+, O+ projectiles
The Journal of Chemical Physics, 1980N2O is bombarded with 1 MeV H+, He+, and O+ projectiles. The dissociation fragments observed are N+, O+, NO+, N2+, N2+, and O2+. Kinetic energy spectra of singly ionized fragments obtained using a time-energy spectroscopy TES technique are reported.
A. V. Shah +4 more
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Physica Scripta, 1982
Total one-electron-loss cross sections for 0.3-3.5 MeV projectiles of 4He+, H, 4He, H-, and 4He- colliding with atomic and molecular hydrogen have been measured. The results in atomic hydrogen have been compared with theoretical calculations based on the free-collision approximation of Dmitriev and Nikolaev, and good agreement is found in most cases ...
P Hvelplund, A Andersen
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Total one-electron-loss cross sections for 0.3-3.5 MeV projectiles of 4He+, H, 4He, H-, and 4He- colliding with atomic and molecular hydrogen have been measured. The results in atomic hydrogen have been compared with theoretical calculations based on the free-collision approximation of Dmitriev and Nikolaev, and good agreement is found in most cases ...
P Hvelplund, A Andersen
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