Abstract: Publication year: 2020Source: Journal of Nuclear and Particle Physics, Volume 10, Number 2J. J. BevelacquaCandidate neutrino string parameters are investigated using a nonrelativistic open string model with fixed endpoints. String parameters and lifetime values are derived as a function of the neutrino mass. Large variations in string parameter and lifetime values are predicted for the various neutrino mass values utilized in this paper. The neutrino lifetime values exceed 1055 y for the 0.0001 – 1.0 eV/c2 neutrino mass range considered in this paper.

Abstract: Publication year: 2020Source: Journal of Nuclear and Particle Physics, Volume 10, Number 1Hesham Mansour, Ahmed GamalThe study of the spectroscopy of bound states of quarkonium systems like and meson in the quark model framework with phenomenological potentials is motivated by quantum chromodynamics (QCD). It is found that analysis of the mass spectra of these systems is effectively given by the nonrelativistic Schrödinger's equation. There are several methods which are used to solve Schrödinger's equation with a general polynomial potential one of them is the Nikiforov-Uvarov (NU) method. It’s one of the effective methods which gives the energy eigenvalues and eigenstates for our potential. The results obtained are in good agreement with the experimental data and are better than previous theoretical studies.

Abstract: Publication year: 2020Source: Journal of Nuclear and Particle Physics, Volume 10, Number 1Tadelech Sisay Mekonnen, Tilahun Tesfaye DeressuIn this study, the activity concentrations of natural (238U, 232Th, 40K) and artificial radionuclides (137Cs) were measured in six different brands of tea samples. The samples have been collected from local market in Ethiopia (Addis Ababa city) and analysis was done by a detection system consisting of High Purity Germanium (HPGe) detector and multichannel analyser. The average activity concentrations of 238U, 232Th and 40K were found to be 3.66±0.47, 18.28±2.4 and 582.59±29.64 Bq/kg respectively. The activity concentration of 40K is increasing faster than the other NORM for Tea. In order to evaluate the radiological hazard of the natural radioactivity, radium equivalent (Raeq), the external hazard index (Hex), internal hazard index (Hin), the total absorbed dose rate (D), and the annual effective dose equivalent (AEDE) have been calculated and compared with the international acceptable values.

Abstract: Publication year: 2020Source: Journal of Nuclear and Particle Physics, Volume 10, Number 1J. J. BevelacquaCandidate string parameters are investigated using a nonrelativistic open string model with fixed endpoints. String parameters are based on the particle mass and lifetime values of selected baryons, leptons, and mesons. A wide variation in string parameter values is predicted for the baryons, leptons, and mesons considered in this paper.

Abstract: Publication year: 2019Source: Journal of Nuclear and Particle Physics, Volume 9, Number 2W. UlmerThe quantization of circuits finds many interesting applications, e.g. quantum computer, molecular and biophysics. The method can be extended to nuclear physics, if the exchange interactions between nuclear particles are described by currents. A system of mutually coupled circuits can be treated by the linear Schrödinger equation yielding symmetries such as SU2, SU3, SU4, etc. A generalization of the principles to a nonlinear/nonlocal Schrödinger is presented; the nonlocal exchange between elementary particles is mediated by a Gaussian kernel (integral transform) in the charge space. The SU3 (or SU4, if four charges Q1,…,Q4 are accounted for) are used as the basic structure of the circuits. In nonlocal fields these symmetries hold, in the same fashion, too, but the energy levels are not equidistant as it the case at circuit quantization, equivalent to the 3D harmonic oscillator. The Gaussian kernel assumes zero value in the positive half-plane with E> 0. To avoid this hindrance a kernel is proposed, which only uses terms up to the second order of the Gaussian kernel, and a self-interacting 3D oscillator keeps excitations of arbitrary order to indemnify the confinement of quarks.

Abstract: Publication year: 2019Source: Journal of Nuclear and Particle Physics, Volume 9, Number 2Hesham Mansour, Ahmed GamalIn the present work, we present different two-body potentials which have oscillatory shapes with magnetic interactions. The eigenvalues and eigenfunctions are obtained for one of those problems using Nikiforov-Uvarov method.

Abstract: Publication year: 2019Source: Journal of Nuclear and Particle Physics, Volume 9, Number 2Fereydoon Ataei, Negar Motakef-KazemiThis research is studied the nonlinear interaction of underdense plasma by high intensity laser pulse regard to ohmic heating and effect of ponderomotive force. The nonlinear ponderomotive force was depended on particle oscillation in laser pulse that resulted to electron charge and electron density oscillation in plasma. The oscillation of heterogeneous electric field was imported to plasma electrons. Using the solutions of Maxwell's and hydrodynamic equations were investigated electron density, magnetic and electric field during plasma. Also Maxwell's equations were obtained through plasma and laser interaction by MATLAB programming language and fourth method of the Runge-Kutta. Based on results, increase of intensity of laser pulse was resulted to decrease of wavelength of magnetic and electric field. At the same time, oscillation of electron density was sharply peaked. Also temperature oscillation was increased and wavelength was decreased.

Abstract: Publication year: 2019Source: Journal of Nuclear and Particle Physics, Volume 9, Number 1Nishant Kumar SharmaThe theory of new type of particles called non-intractable particles, these are the particles which attend every mass state in universe, with it defining the statistic of Non-Intractable particles, the equations of Non-Interactive Mechanics, structure of Nucleus and Atom according to Non-Interactive Mechanics, proof of Dirac Particle-Antiparticle theory, Nishant Effect -The process by which Non-Interactive particles react with matter with this the proofs of Nishant effect 1. Linear harmonic oscillator 2. Plank’s radiation law 3. Mass- energy equivalence relation E=mc^2 4. velocity of light 5. The Relativistic relation E^2=P^2C^2+m^2c^4.

Abstract: Publication year: 2019Source: Journal of Nuclear and Particle Physics, Volume 9, Number 1Manouchehr AmiriIn this paper, I propose a new model compatible with the internal symmetries of elementary particles to identify the invariant charges of standard model unitary symmetries by physical parameters in an extra spatial dimension. Applying the concepts of zero point energy and center of mass for elementary particles and introducing helixons as time-like geodesics in 4+1 dimensional toral manifold, we show that the free motion of particles center of mass on these helixons results in the emergence of gauge symmetries discovered in standard model and presents pure physical interpretations for particles’ invariants such as electric charge, isospin, hypercharge and coupling constants of electroweak and strong interactions. This allows to incorporate unitary symmetries without the assumption of internal spaces and several extra dimensions. Higgs vacuum expectation value, and effective radius of Higgs boson are among the prominent results of helixon theory. Moreover it predicts the small deviation from Larmor frequency in very weak field, proves the Montgomery conjecture and emergence of golden ratio in energy levels.

Abstract: Publication year: 2019Source: Journal of Nuclear and Particle Physics, Volume 9, Number 1J. J. BevelacquaPreon masses are predicted using a first-order mass formula. The model assumes there are six preons (D, U, S, C, B, and T) that combine to form the three generations of quarks. The two lightest preon masses (U and D) and two model parameters (δ and ξ) are derived from the quark vertex and an assumed relation between the U and D preons. The remaining preon masses are determined from the model parameters and the s, c, b, and t quark masses.