nuclear radius
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Author(s):  
Gayatri Sarkar ◽  
Moumita Maiti ◽  
Amandeep Kaur ◽  
Manoj K. Sharma

The decay dynamics of 197Tl* compound nucleus has been studied within the framework of the dynamical cluster-decay model (DCM) at above barrier energy Ec.m. ≈ 100 MeV using quadrupole deformed configuration of decay fragments. The influence of various nuclear radius parameters on the decay path and mass distributions has been investigated by analysing the fragmentation potential and preformation probability. It is observed that 197Tl* nucleus exhibits the triple-humped mass distribution, independent of nuclear radius choice. The most preferred fission fragments of both fission modes (symmetric and asymmetric) are identified, which lie in the neighborhood of spherical and deformed magic shell closures. Moreover, the modification in the barrier characteristics, such as interaction barrier and interaction radius, is observed with the variation in the radius parameter of decaying fragments and influences the penetrability and fission cross-sections. Finally, the fission cross-sections are calculated for considered choices of nuclear radii, and the results are compared with the available experimental data.


2020 ◽  
Author(s):  
Raymond Walsh

<div> <div> <p>The atomic nucleus is made of protons and neutrons, each comprising a mix of 3 up or down quarks. No consensus exists for nuclear structure from among the 30+ proposed models of the atomic nucleus, although they generally agree that quarks play no role. The light nuclides of interest to nuclear fusion exist in a purgatory of uncertainty, wanting not only for structure but also for some insight into their erratic sizes. The deuterium nucleus is twice the mass of the proton but 2.5 times larger. In fact, deuterium is larger than either tritium or helium-4. The lithium-7 nucleus is larger than all of these, yet smaller than lithium-6. Here we show that an alternating quark model (AQM) predicts these erratic nuclear radii to within 99% of experimental (SD 2.5%). The distance between sequential quarks is constant and equal to the radius of the proton. Quark structures assume simple geometries. Alternating quarks predict the height of the Coulomb barrier, and demonstrate a coulombic mechanism for quantum tunneling. Through the lens of nonlinear dynamics, quarks behave as linked harmonic oscillators traveling within a basin of attraction. This satisfies the uncertainty principle while allowing localization of an average quark position. The alternating quark model thus represents an intersection between chaos theory and quantum mechanical uncertainty.<br></p> </div> </div>


2020 ◽  
Author(s):  
Raymond Walsh

<div> <div> <p>The atomic nucleus is made of protons and neutrons, each comprising a mix of 3 up or down quarks. No consensus exists for nuclear structure from among the 30+ proposed models of the atomic nucleus, although they generally agree that quarks play no role. The light nuclides of interest to nuclear fusion exist in a purgatory of uncertainty, wanting not only for structure but also for some insight into their erratic sizes. The deuterium nucleus is twice the mass of the proton but 2.5 times larger. In fact, deuterium is larger than either tritium or helium-4. The lithium-7 nucleus is larger than all of these, yet smaller than lithium-6. Here we show that an alternating quark model (AQM) predicts these erratic nuclear radii to within 99% of experimental (SD 2.5%). The distance between sequential quarks is constant and equal to the radius of the proton. Quark structures assume simple geometries. Alternating quarks predict the height of the Coulomb barrier, and demonstrate a coulombic mechanism for quantum tunneling. Through the lens of nonlinear dynamics, quarks behave as linked harmonic oscillators traveling within a basin of attraction. This satisfies the uncertainty principle while allowing localization of an average quark position. The alternating quark model thus represents an intersection between chaos theory and quantum mechanical uncertainty.<br></p> </div> </div>


2020 ◽  
Author(s):  
Raymond Walsh

<div> <div> <p>The atomic nucleus is made of protons and neutrons, each comprising a mix of 3 up or down quarks. No consensus exists for nuclear structure from among the 30+ proposed models of the atomic nucleus, although they generally agree that quarks play no role. The light nuclides of interest to nuclear fusion exist in a purgatory of uncertainty, wanting not only for structure but also for some insight into their erratic sizes. The deuterium nucleus is twice the mass of the proton but 2.5 times larger. In fact, deuterium is larger than either tritium or helium-4. The lithium-7 nucleus is larger than all of these, yet smaller than lithium-6. Here we show that an alternating quark model (AQM) predicts these erratic nuclear radii to within 99% of experimental (SD 2.5%). The distance between sequential quarks is constant and equal to the radius of the proton. Quark structures assume simple geometries. Alternating quarks predict the height of the Coulomb barrier, and demonstrate a coulombic mechanism for quantum tunneling. Through the lens of nonlinear dynamics, quarks behave as linked harmonic oscillators traveling within a basin of attraction. This satisfies the uncertainty principle while allowing localization of an average quark position. The alternating quark model thus represents an intersection between chaos theory and quantum mechanical uncertainty.<br></p> </div> </div>


2020 ◽  
Author(s):  
Roberto Napolitano

In the present work we assume that in the atomic nucleus the gravitoelectromotive force (F_ge=GKMm/R^2) acts as responsible for the stability of nucleus and for the nuclear size, and that the potential energy related to this force be given by the ratio F_ge/2πR with R equal to the nuclear radius observed in the electron scattering experiments, obtaining surprising outcomes.The new approach offers an occasion for discussing about the physics and chemistry foundations, in particular about the meaning of the gravitational potential energy and about the nature of the atomic nucleus, which perhaps should be reconsidered in deterministic terms, rather than probabilistic ones.


2020 ◽  
Author(s):  
Roberto Napolitano

In the present work, by moving from the assumption that the Sun (and all the massive bodies) produces, starting from a certain distance from it, attractive and repulsive gravitational forces at the same time, giving life to the movement of the planets around the Sun according to the same principle of pendulum, I managed to derive a perihelion precession formula, a black hole radius formula and, above all, a formula of the atomic nuclear radius, which was missing until now, all in excellent agreement with the observation and in a completely independent way of the Einstein’s theory of relativity.I have also shown that the nuclear radius formula can also be successfully used to predict the radius of neutron stars.Moreover I have found — always through the same principles that allowed me to achieve the above results, in particular through the modification of the Newtonian gravitational potential, in turn due to the different modus-operandi of gravity force — a formula of the non-decreasing orbital velocity of galactic stars, without considering dark matter.Then I have demonstrated the black hole is composed only of protons, and that it’s similar to the nucleus of the atom and, analogously, the galaxy is similar to the atom, since the stars moving around the central nucleus in the same way as the electrons move around the atomic nucleus. I have also found another similitude among atomic nucleus, black hole and neutron stars, namely the self-orbiting phenomenon existing in all the cases.From the mathematical findings obtained in the present work it has also emerged the existence, both at the microscopic and the macroscopic level, of the gravito-electric force (or, if one prefers, electro-gravitational force), resulting from the fusion of the gravitational force with the electrostatic one, working exactly in accordance with Newtonian mechanics, although modified by the introduction of a repulsive force in addition and in opposition to the attractive one, that makes us understand the universe works always in the same way, both in macro and in micro. Furthermore, by means of the theory here proposed, it has been possible to find a theoretical foundation to the Planck constant, to derive the photon mass, to derive the electron orbital radius, inner and outer, as well as to prove the existence of the gravito-electric radiations.It is also emerged the existence of the universal principle of specific asymmetry between gravitational potential energy and kinetic energy, as a cause of nuclear energy E = mc^2.In this perspective, the present work can represent a potential unifying way between the macrocosm and microcosm mechanics.


2020 ◽  
Vol 167 ◽  
pp. 1-35 ◽  
Author(s):  
Sukhjeet Singh ◽  
Sushil Kumar ◽  
Balraj Singh ◽  
A.K. Jain
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