Branching ratios and screening effect in the d + d nuclear interaction

Using the WKB approximation for the evaluation of penetrabilities at stellar energies, the D(d, p)T and D(d,n)3He total cross-sections are analysed in the energy range 0–100 keV (c.m.). The s and p wave contributions are extracted in each of these reactions. The branching ratios calculated from this partial wave decomposition are in good agreement with the experimental values deduced from muon catalyzed fusion and with those calculated from R-matrix theory. The screening effect is studied and the U0 electron screening potential discussed

Analyses of the life cycle impact assessment of pharmaceutical product inventories

Life cycle impact assessment (LCIA) is one of basic steps in life cycle assessment methodology (LCA). This paper presents the application of approach LCA for the rejections of drugs company SAIDAL, in order to determine the environmental impacts relative to this industrial activity, since it is classified among industry leader in the pharmaceutical field in Algeria, and that it takes part largely in the environmental disturbance by generating various categories of impacts. For this purpose, an eco-balance was establish by the collection of the theoretical data to the meadows of the company and of the practical data, resulting from the assay of pharmaceutical liquid

Adsorption of CD(II) ions from aqueous solution using mixed sorbents prepared from olive stone and date Pit

The aim of this study is to remove Cd(II) ions from aqueous solutions by adsorption. Mixed sorbent prepared from olive stone and date pit, an agricultural solid by-product was used as adsorbent. The adsorption experiments of Cd(II) onto the mixture of olive stone and date pit were conducted at different parameters such as, percent of olive stone and date pit in the mixture, temperature, initial solution pH and initial Cd(II) concentration. Adsorption isotherms were obtained at different percent of olive stone and date pit in the mixture. This adsorption data was fitted with the Langmuir, Freundlich and Temkin isotherms. The thermodynamic of Cadmium sorption on the mixed sorbent follows the Langmuir model and the sorption capacity for cadmium increases when we add a small amount of olive stone at date pits (90% of date pits in mixture and 10% of olive stone) and a small amount of date pits at olive stone (90% of olive stone and 10% of date pits in mixture. In addition, the thermodynamic parameters, standard free energy (°G°), standard enthalpy (ΔH°) and standard entropy (ΔS°) of the adsorption process were calculated. The sorption of Cd(II) onto the mixture of olive stones and dates pit is spontaneous and presents an endothermic nature. The characteristics of the mixture were determined by the analysis of infra red spectral analysis. The results show that the mixture sorbent from olive stone and date pit is an alternative low-cost adsorbent for removing Cd(II

Branching ratios and screening effect in the

Using the WKB approximation for the evaluation of penetrabilities at stellar energies, the D(d, p)T and $\rm D(d,n)^3He$ total cross-sections are analysed in the energy range 0–100 keV (c.m.). The s and p wave contributions are extracted in each of these reactions. The branching ratios calculated from this partial wave decomposition are in good agreement with the experimental values deduced from muon catalyzed fusion and with those calculated from R-matrix theory. The screening effect is studied and the U0 electron screening potential discussed

Interpretation physique du facteur astrophysique S(E) aux energies stellaires a partir de la methode WKB

For ‘non-resonant’ reactions, a physical interpretation of the astrophysical factor S(E) in terms of the Coulomb barrier penetration factor and an intrinsic nuclear factor is proposed. Using the WKB (Wentzel, Kramers, Brillouin) approximation to evaluate the penetrabilities at stellar energies, we point out a drastic difference between the absolute values of S(0) according to whether s or p waves dominate the reaction. The variation with energy of S(E) to first order can also sign the nature of the wave. An application for the 6Li(d, α)4He and 7Li(p, α)4He reactions is presented. (Elsevier

Effects of Biaxial Crystal Field on the Magnetic Properties on a Spin-1 Ising System

Within the effective field theory (EFT) with a probability distribution technique that accounts for the self spin correlation functions, the magnetic properties such as the hysteresis loops, susceptibility and magnetization of a spin-1 Ising system with effects of a biaxial crystal field are studied. The effects of the biaxial crystal field on the magnetic properties are discussed and numerical calculations are performed and analyzed for the cases of the honeycomb lattice. A number of interesting phenomena such as the shape of the hysteresis loops and the susceptibility have been found