We present the results of a study performed on the interactions of 10.6A GeV gold nuclei in nuclear emulsions. In a minimum bias sample of 1311 interactions, 5260 helium nuclei and 2622 heavy fragments were observed as Au projectile fragments. The experimental data are analyzed with particular emphasis of target separation interactions in emulsions and study of critical exponents. Multiplicity ...

The primary objective is establishing tangible experimental methods and data analyzing methods in order to grasp various phenomena, which were the behavior of ejecta and projectile, the penetration depth and speed of projectile, fractured grains and the pressure distribution, induced by high-speed impact of projectile on sand. The plate impact experiments were conducted using vertical powder gu...

A technique for electron spectroscopy which yields full two-dimensional momentum distributions for continuum electrons has been used to study ejected electrons from single ionization of He by C and proton projectiles at low velocities. Projectile velocities of 1.63, 1.38, and 1.16 a.u. for C and 2.39, 1.71, 1.15, .85, and 0.63 a.u. for protons were used. All spectra show much broader distributi...

In the present study, the three-dimensional elastic discrete element method (DEM) and the elastic finite element method (FEM) analysis were, respectively, applied to the randomly distributed identical spheres as a granular target and to the cylindrical projectiles in order to clarify dynamic response during penetration. In the target, it was found that highly densified region was formed just ah...

0168-583X/$ see front matter 2009 Elsevier B.V. doi:10.1016/j.nimb.2009.01.058 * Corresponding author. Fax: +48 12 633 7086. E-mail address: [email protected] (B Molecular dynamics computer simulations have been used to investigate the damage of a benzene crystal induced by 5 keV C20, C60, C120 and C180 fullerene bombardment. The sputtering yield, the mass distributions, and the d...

The theoretical approach to the elastic scattering of a nucleon from a nucleus, pioneered by Watson [1], made familiar by Kerman, McManus, and Thaler (KMT) [2] and further developed as the spectator expansion [3, 4, 5, 6] is now being applied with striking success. In a similar vein, a slightly di erent approach to the multiple scattering expansion within the KMT framework is being pursued by t...

To study penetrating traumatic brain injury biomechanics, a full metal jacket 9-mm handgun projectile was discharged into a transparent brain simulant (Sylgard gel). Five pressure transducers were placed at the entry (two), exit (two), and center (one) of the simulant. High-speed digital video photography at 20,000 frames per second (fps) was used to capture the temporal cavity pulsation. Press...

This paper provides an overview of the coastline eroding occurrences in Ghana. Ghana is located in West Africa boarded at the south by the Gulf of Guinea and the Atlantic Ocean with four of its ten regions having its major cities lying along the coast. The coastline of Ghana has over the decades experience minor coastal erosion but the recent situation is becoming apocalyptic and needs further ...

A number of mechanisms have been proposed for the penetration of laminates comprising ultra-high molecular weight polyethylene (UHMWPE) fibres in a polymeric matrix. Two-dimensional ballistic experiments are conducted in order to directly observe the transient deformation and failure processes occurring immediately under the projectile via high-speed photography. Two sets of experiments were co...

In some smart weapons, estimation of the impact point of the shell at each computation cycle of the control law is an integral part of the control strategy. In these situations, the impact point predictor is part of the imbedded computing system onboard the projectile. Practical considerations dictate that the impact point predictor yield rapid yet reasonably accurate estimates. Common methods ...