In order to understand the mechanical behavior of granular deposit subjected to high-speed projectile impact, we perform both physical experiments and grain-scale numerical simulations. In the high-speed impact experiment, we adopted a new technology to observe the deceleration of projectile after penetrating into sand layer. The observed results together with simple one-dimensional model with ...

By now many experimental data on fully differential cross sections (FDCS) exist for single target ionization covering a broad range of different collision systems. At this stage it therefore seems reasonable to turn to somewhat more complex ionization processes and to fully exploit the opportunities provided by heavy projectiles, in order to advance our understanding of collision-induced few-pa...

in this paper, dynamical behavior of the delay mechanism of a special projectile controller is studied, using 3d finite element simulation. the controller considered here is among of high-acceleration mechanical controllers. due to high linear and angular accelerations of the projectile and also explosion risk, experimental investigation is very limited and almost impossible. so, numerical simu...

Two existing global medium-energy nucleon-nucleus phenomenological optical model potentials are described and compared with experiment and with each other. The rst of these employs a Dirac approach (second-order reduction) that is global in projectile energy and projectile isospin and applies to the target nucleus Pb. Here the standard S-V (isoscalar-scalar, isoscalar-vector) model has been ext...

This paper describes a new concept for propelling a projectile to hypervelocities and demonstrates the feasibility by numerical simulations. The concept employs imploding blast waves to accelerate a projectile which travels down a launch tube. The launch tube can be open to the atmosphere or sealed and maintained at some low pressure to minimize drag. The launch tube has a liner that contains a...

We present a theoretical analysis of high-order harmonic generation from ion-atom collisions in the presence of linearly polarized intense laser pulses. Photons with frequencies significantly higher than in standard atomic high-harmonic generation are emitted. These harmonics are due to two different mechanisms: (i) collisional electron capture and subsequent laser-driven transfer of an electro...

The problem of Coulomb breakup in the scattering of a two-body loosely bound projectile by a heavy target is addressed. A basis of transformed harmonic oscillator (THO) wave functions is used to discretize the projectile continuum and to diagonalize the Hamiltonian of the two-body system. Results for the reaction 8B+58Ni at sub-Coulomb energies are presented. Comparison of different observables...

A high-speed projectile in combustible gas can initiate and stabilize a detonation wave under suitable conditions [1]. In this paper, numerical simulations of projectile induced detonation waves are presented. Using a one-step irreversible reaction model, the transition from shock-induced combustion to stabilized oblique detonation is observed via numerical simulations. An analysis of this tran...