Journal of Nuclear Research and Applications
Volume:2 Issue: 4, Autumn 2022

We have studied the binding energies of a group of single Λ-hypernuclei in a relativistic approach and modeled the single Λ-hypernuclei as a Λ-core binary system. Since the Hellmann potential is ideal for defining nucleon-core interaction and the single Λ-hypernuclei can be assumed as a single nucleon coupled to the whole nuclei but does not suffer from Pauli blocking, we have selected this potential for interaction between the Λ particle and the core. The time-independent Dirac equation is a reasonable option for defining the relativistic bound states that correspond to a spin-1/2 Λ hyperon in the hypernuclei. We solved this equation by using the Hellmann potential under the presence of pseudo-spin symmetry in terms of the generalized parametric Nikiforov-Uvarov method, a way to make the application of the Nikiforov-Uvarov method as plain as possible. Our results were in good agreement with experimental values and other theoretical works. Hence, this model is applicable for the Λ-hypernuclei.

In this study, the effect of rarefied region in the rotor of the centrifuge was investigated. In a rotor of the centrifuge, the feed inlet is positioned in the rarefied area. The continuum hypothesis is not valid in the rarefied area; therefore, it desires to be analyzed by probabilistic methods like Direct Simulation Monte Carlo (DSMC). In the present study, Computational Fluid Dynamic (CFD) method is used to simulate the continuum area, and the DSMC method is employed in the rarefied area. An implicit coupled density-based scheme was performed for CFD method, and Variable Hard Sphere (VHS) and diffuse model were employed in the DSMC method. Also, the local Knudsen number was defined to determine the interface location between the continuum-rarefied regions (r=0.086 m). The comparison results of pure CFD and CFD-DSMC methods illustrated large differences between the flow properties in the rarefied regions. The results showed that the value of separation power obtained from pure CFD and CFD-DSMC solution is 10.5% different.

This paper investigates the effect of circuit inductance on pinch-time of plasma focus. The dense plasma focus is a plasma discharge powered by a capacitor bank. The Mather type Dense Plasma Focus is constructed in cylindrical geometry and is made up of coaxial anodes and cathodes with varying radiuses. An insulator sleeve separates the electrodes, and the cathode rode forms circles around the anode tube. Different parameters, such as geometry and structure of the anode bar, and decreasing inductance are involved in the optimization of plasma focus. One way to increase the gain and optimization of pulsed plasma systems is to reduce the inductance of the circuit. For this purpose, we investigate the effect of different values of total circuit inductance on pinch formation time. Experimental and simulation results are compared. the proposed system shows a decent functionality that if the inductance reduces, the efficiency of the system will increase.

"Provide an abstract of 50 to 150 words. The abstract should briefly describe the objectives of the research, the results achieved, and the major conclusions. You should give special emphasis to the novelty of your work. The abstract should not contain any undefined abbreviations references. Also avoid introductory remarks, details of the method (e.g., the method has been used for many decades successfully) or listing your results."Contamination of groundwater with colored and toxic wastewater causes many environmental problems and has adverse effects on human health. In this study decolorization of textile dye, Basic Red 46, were studied using advanced oxidation processes (AOPs) in a non-thermal plasma reactor. The reactor is based on pin-to-water high-voltage corona discharge by using a high voltage AC power source and air flow. The rate of the dye removal for 100 ml of this solution was investigated. The results showed that the corona discharge exhibited 85 % of degradation efficiency for 50 mg/l of basic Red 46 within 30 min of treatment time was achieved.

The magnetic moments of Λ-hypernuclei are the most interesting observables which provide a highly sensitive probe of lambda in the hypernuclei structure and also supply direct information on hyperon-nucleon interactions. In this work, we derive the magnetic moments of Λ-hypernuclei such as O , C and Ca employing a relativistic approach in the presence of the Dirac equation and the spin-orbital potential in their ground and excited states, i.e. the 1S1/2, 1P3/2 and 1P1/2 states. We, then, extract an analytic solution for the wave function of hyperon which is needed for computing the magnetic moments of Λ-hypernuclei. The hypernuclei magnetic moments are the magnetic moment of the last unpaired baryon for the odd mass hypernuclei, therefore, in our work we study the hypernuclear magnetic moment with one Lambda added to a closed-shell core of nucleons. Since Λ-hypernuclei is an isoscalar particle it is possible to directly probe the modified core current electromagnetically.

This investigation was carried out to determine the effects of gamma radiation on germination characteristics of gladiolus corms. This experiment was conducted through a factorial design in randomized complete block with three replications. Two factors included cultivars of gladiolus (Red Advance, White Prosperity, Amsterdam, and Rose Supreme) and doses of gamma radiation (0, 15, 25, 35, 45, 55, 65, and 75 Gy). The results showed that corm weight, corm size, and number of daughter corms decreased with increasing radiation doses, however, low dose (15 Gy) stimulated them. High doses of gamma irradiation (75 Gy) showed the lethal effects on various vegetative traits. The low yield at high doses can be due to the reduced vegetative growth as a result of gamma treatments. The results of this study suggest a dose of 40-65 Gy as the optimal dose to improve the vegetative traits of gladiolus.Keywords: Gladiolus, Genetic diversity, Corm, Mutation