Projectile stripping

DISI0N2+STRIP Double Dissociative Ionization of Molecules with Projectile Stripping... 

Our particular interest lies in the calculation of the linear energy deposition, or stopping power, of swift ions in materials, 5o(v). In the first Born approximation, and for a fully stripped projectile, this quantity can be written [2-4]... 

A close analogy to the localized surface interaction can be found in the field of chemical kinetics, namely, in the spectator stripping mechanism (5, 6) of the gas reactions, as evidenced by the recent crossed-molecular-beams experiments. Here the projectile seems to meet with only a part of the target molecule (that one to be transferred), while the rest of the target behaves as a spectator, in a sense not taking part in the reaction. 

For example, uranium-238 when bombarded with fluorine-19 produced Md-252. Also, certain nuclear reactions carried out by heavy ion projectiles involve stripping reactions in which some protons and neutrons may transfer from the projectiles onto the target nucleus, but the latter might not capture the projectile heavy ion. 

An example of the features of the spectrum of secondary electrons emitted in H° impact on water molecules from the work of Bolorizadeh and Rudd [67] is shown in Fig. 16. Compared to the simple spectrum of electrons emitted by proton impact shown as the solid line in Fig. 16 the spectrum from H° impact has an additional peak centered at an electron energy of approximately 82 eV. This broad peak is from the superposition of the spectrum of electrons stripped (elastically scattered) from the projectile on the spectrum of electrons ejected from the target. Because the stripped projectile electrons originate as bound electrons in the rest frame of the moving projectile, their laboratory energy is given approximately hy W = meE jM and the width of the peak is determined by the Compton profile of electrons in the projectile frame, but also transformed to the laboratory frame-of-reference. The results shown in Fig. 16 clearly illustrate that the cross-sections for... 

Small Arms Ammunition , TM 9-1990(1947), 42-4(Bullet Stripping Test, Bullet Penetration Test, Bullet Fit Test and Bullet Pull Test are briefly described) 12)E.Burlot, MAF 23, 185 (1949)(Detonation of ordinary expls by impact of solid projectiles launched at great velocities) 13)L.Medard ( )Cessat, MAF 23, 195-203(1949)... 

Abstract. Cross sections for electron transfer in collisions of atomic hydrogen with fully stripped carbon ions are studied for impact energies from 0.1 to 500 keV/u. A semi-classical close-coupling approach is used within the impact parameter approximation. To solve the time-dependent Schrodinger equation the electronic wave function is expanded on a two-center atomic state basis set. The projectile states are modified by translational factors to take into account the relative motion of the two centers. For the processes C6++H(1.s) —> C5+ (nlm) + H+, we present shell-selective electron transfer cross sections, based on computations performed with an expansion spanning all states ofC5+( =l-6) shells and the H(ls) state. 

The test sample assembly is inserted into the bore of the mortar and the projectile is attached to the open end of the mortar. A pen is inserted into the hole in the pen-holder and a reference line is marked on the strip chart paper when the fully-loaded mortar is at rest. The detonator leg wires are connected to the firing circuit and the charge is fired. The pendulum swing length can be read from the results recorded on the strip chart paper. 

In transfer reactions one or several nucleons arc transferred from the projectile to the target nucleus, or vice versa. The first kind is also called a stripping reaction and the second a pick-up reaction . The simplest forms of stripping reactions are the (d, p) and (d, n) reactions with deutcrons, which proceed with relatively high cross sections ... 

Fermi and Teller analyzed the stopping of energetic particles in a Fermi gas at velocities v = vF, where vF is the Fermi velocity. Since Fermi velocities in solids typically fall in the range of 0.7 to 1.3v0, the Fermi-Teller analysis corresponds to projectile ions that are not fully stripped. From Fig. 5.3 we would anticipate that electronic stopping in this velocity regime would be proportional to the projectile velocity. While the Fermi-Teller model of stopping shows that the electronic energy-loss is proportional to the projectile velocity, its quantitative abilities are questionable. 

All dud ammunition is a source of enemy supply. After alrstrlkes and artillery and mortar missions, enemy salvage teams make sweeps to collect duds. Lighter ordnance Is carried away to preparation areas large bombs and projectiles are broken down and stripped on the spot. In some cases the larger duds are rigged as boobytraps where they have fallen. This is especially true when the enemy feels the strike or fire mission was a preparation for an Infantry attack. 

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