Cairo University

MTPR Journal


Simulation of Fusion Evaporation of Compound Nuclei Created in Ultra Intense Laser Interaction with Carbon Targets

& doi:
*Loftia M. El Nadi1, *Magdy Omer, *Hussein Abdelmoniem , *Galila A. Mehena, *A.M. Aboulfotouh , *Khaled A. ElSayed,* A. I. Refaei, 1 Mohamed Ramadan, 2Mohamed Ezzat , 3Yasser ElBaz, 4Hisham Imam

Compound nucleus creation in Ultra Intense Laser UIL interaction with materials could be possible through Fusion-of the target nuclei with the accelerated target charged ion in the laser field. The residual radioactive nuclei in the remaining target material could well be due to evaporation of protons, neutrons, deuterons etc. from the created compound nucleus. We here with report simulation of compound nucleus formation followed by particle evaporation applying Monto Calro code PACE-4 to estimate the possible Fusion cross-section for carbon nuclei forming excited Mg24 compound nucleus. The results shown in Figure 1 indicates the highest cross section of such possibility peaking at carbon ions projectile energy ≈ 30 MeV (2.5 MeV/ A ). The cross sections for production of neutron deficient nuclei resulting from the Fusion-Evaporation process of C12 + C12 are also estimated. The simulation results help greatly in choosing the power of the UIL as well as the design of the experimental set up to be applied in verifying the Fusion-Evaporation Phenomena. FIGURE 1.1: Simple schematic of the four stages of inertial confinement fusion via “hot spot” ignition. Stage 1: Energy is delivered to the surface of a tiny hollow sphere (a few millimeters in diameter) of fusion fuel (the target). The blue arrows represent the driver energy delivered to the target-this is the laser light, x-ray radiation or particle beams that heat the outer yellow shell. Stage 2: Orange arrows indicate the ablation of the outer shell that pushes the inner shell towards the center. The compression of the fusion fuel to very high density increases the potential fusion reaction rate. Stage 3: The central low-density region, comprising a small percentage of the fuel, is heated to fusion temperatures. The light blue arrows represent the energy transported to the center to heat the hot spot. This initiates the fusion burn. Stage 4: An outwardly propagating fusion burn wave triggers the fusion of a significant fraction of the remaining fuel during the brief period before the pellet explodes/disassembles. Steady power production is achieved through rapid, repetitive fusion micro-explosions of this kind This image obtained from [1]