Original Article | Volume 4, Issue 1 DOI: 10.35840/2631-5017/2515Diffusion Cloud Chamber in EducationTamas Gyorfi and Peter RaicsAbstractRadioactivity and the accompanying ionizing radiations are important part of the environment. They cannot be observed by humans. However, with the cloud chamber everyone can easily see that the radiations are really present in our environment. Using cloud chambers in public education students are able to gain direct experiences in many fields like natural and artificial radioactivity, characteristics of the particles, features of the quantum world, random nature of the processes as well as the unity of classic and contemporary physics. Pictures, videos, descriptions and computer codes assisting the evaluation may be really useful in lessons and in different studies including university education. |
Research Article | Volume 4, Issue 1 DOI: 10.35840/2631-5017/2514Nuclear Poincaré Cycle Deduced From Regularities in Neutron Resonances in 40Ca and 56Fe - A Comparison with the Semi-Classical ModelMakio OhkuboAbstractThus far, compound nuclei formed by neutron resonance reactions have been believed to exibit quantum chaos form. However, simple integer ratios are widely observed among resonance energies composing families with high accuracy. From these integer ratios, the Poincaré cycles and the nodal resonances are deduced through (Sn/LCE) spectra for 40Ca, and 56Fe, and the neutron resonance energies in the families are described by simple arithmetic expressions based on Sn and several small integers. The breathing model predicts that resonance reactions occur when the Poincaré cycle synchronizes with the de Broglie waves of incident neutrons. A crude model is presented for the compound nucleus composed of several time-quantized normal-modes oscillators with total excitation energy Sn, including the zero-point energy. |
Research Article | Volume 4, Issue 1 DOI: 10.35840/2631-5017/2513The Controversy on the Inverse-Square Law for Coulomb's InteractionsWladimir GuglinskiAbstractAbdus Salam and his co-workers proposed the concept of strong gravity in the 1960s, as an alternative to the young QCD, so that to solve the puzzles concerning to confinement and asymptotic freedom, not requiring, as occurs in QCD, to abandon the behavior of a force acting from the inverse-square law. At that time asymptotic freedom in QED was observed by some theorists, and by Gerard't Hooft in 1972, whose physical significance however was realized only one year later by David Gross, Frank Wilczek and David Politzer. They "rehabilitated" the Quantum Field Theory, because prior to their discovery it was under suspicion, since Coulomb interactions become infinitely strong at very short distances. But this approach has not so far led to a Grand Unified Theory. |
Research Article | Volume 4, Issue 1 DOI: 10.35840/2631-5017/2512Production of Low Activity Rhenium by Transmuting Tungsten Metal in Fast Reactors with ModeratorTsugio Yokoyama and Masaki OzawaAbstractThe feasibility of rhenium (Re) production by irradiating tungsten (W) metal in a medium size fast reactor was evaluated by using a Monte Carlo code. The irradiation of W with hydride zirconium moderator in a fast reactor blanket region can produce about 50 kilograms of Re per every 3 years, which corresponds 1% of Japanese domestic annual production. The specific activity of Re recovered shows below the exemption level, and furthermore, it is decreased to the level below the natural Re specific activity when deuteride zirconium moderator is used. |
Research Article | Volume 4, Issue 1 DOI: 10.35840/2631-5017/2511Coincidence Summing Correction for Cylinder and Marinelli Beaker Sources by Monte Carlo SimulationWaseem khan, Chaohui He and Yu CaoAbstractCoincidence summing effects arises when two or more γ-rays are emitted in a cascade from an excited nucleus and are detected within the resolving time of the detector. Without correction of such effects, the activity of radionuclides cannot be accurately determined. For the correction of summing effects, a new simulation method in GEANT4 was established to simulate the coincidence summing correction factors |
