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Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Applied Physics B: Lasers and Optics | Year: 2010

A parameter for evaluating the sensitivity of quantum vibrational energy to anharmonicity in a diatomic gasdynamic laser is defined and calculated by considering the corresponding diatomic molecules as quantum anharmonic oscillators under an interatomic Morse potential. The variation of the above parameter in terms of the vibrational states and in terms of an involved anharmonic coefficient is discussed. In particular, the parameter in question at the classical limit is examined. Both weak and strong anharmonicities are discussed. © Springer-Verlag 2010.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Optik | Year: 2013

The optical potential for photons interacting with matter is expressed mathematically by using the involved relativistic wave-number. In fact, the above expression is derived from equating the optical-potential energy to the kinetic energy of a single photon. Since the photon rest-mass is included in the above mathematical expression, that this mass is actually non-zero and wavelength-dependent is considered. © 2012 Elsevier GmbH.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Optik | Year: 2013

The rest-mass and velocity of the photon are treated as functions of wavelength. In fact, by assuming the photon rest-mass as inversely proportional to wavelength, we show that the photon velocity does not depend on wavelength. In contrast, the photon rest-mass being considered as independent of wavelength, we show that the photon velocity depends on wavelength and we calculate this wavelength dependence. © 2012 Elsevier GmbH.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Acta Physica Polonica A | Year: 2015

We investigate several issues related to the electronic states in the ligand orbital of a given transition-metal salt as, for example, a K2CuCl42H2O-type compound. In fact, to get our calculation, we start from an expression for the electronic density of states in a compound of the above type. In addition, various aspects related to superexchange interaction in both the paramagnetic and ferromagnetic cases are discussed and the electronic conduction process in the ligand orbital is studied.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Advanced Studies in Theoretical Physics | Year: 2012

We present a theoretical-analytical formulation on rapidity of secondary charged particles produced in a given inelastic hadron-nucleus collision at 22.6-400 GeV, starting from considering the maximum rapidity gap relative to charged multiplicity in rapidity space. In fact, the set of rapidity values of the charged particles is characterized as a seminormed set when the charged multiplicity is regarded as sufficiently large. Several relevant parameters and a key continuous linear operator are introduced and calculations involving them are performed.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences | Year: 2016

We predict that a given transition-metal salt as, for example, a K2CuCl4·2H2O-type compound, can behave as an electrical conductor in the paramagnetic case. In fact, we determine the electrical conductance in a salt of this type. This conductance is found to be quantised in agreement with previous well-known results. Related mathematical expressions in the context of superexchange interaction are obtained. In addition, we determine the corresponding (macroscopically viewed) current density and the associated electron wave functions.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Modern Physics Letters B | Year: 2012

The optical potential of an attractive nonrelativistic electron gas interacting with nuclear matter is determined on the basis of the concept of degenerate Fermi gas. In fact, the involved electrons are treated as three-dimensional quantum harmonic oscillators confined at the surface of a spherical (approximately ideal) potential well. Within this picture, the Fermi velocity is calculated as well as the spatial electron density at the surface of the potential well and the attractive force between the electron gas and the nuclear matter. In addition, considerations related to the LippmannSchwinger model are made. © 2012 World Scientific Publishing Company.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
International Journal of Modern Physics E | Year: 2012

For the first time, we present a theoretical formulation to determine the nonrelativistic repulsive optical potential relative to neutron-nucleus interaction in terms of the s-wave coherent scattering amplitude and the radius of the nucleus which is regarded as a spherical infinite potential well. Within this context, the Fermi velocity is determined in excellent agreement with the Fermi velocity obtained from considerations relative to nuclear density obeying the Saxon-Woods distribution. Assuming this distribution, the force relative to the neutron-nucleus interaction is calculated. Aspects related to the involved chemical potential are discussed. Our results are consistent with previous work. © 2012 World Scientific Publishing Company.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Reports on Mathematical Physics | Year: 2012

For the first time, we present a matrix formalism involving the Fock operator relative to a quantum spherical non-parabolic electron gas in the absence of electric and magnetic fields. In fact, a new mathematical physics formulation based on tensor-dyadic product of matrices is proposed for determining the Fock electron energy in a quantum spherical non-parabolic electron gas. In our formulation, phenomenological weight factors are introduced as a measure of electron-electron interaction and electron-confinement effects among other issues. © 2012 Polish Scientific Publishers.


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Chemical Physics Letters | Year: 2015

The shift in the band-gap experienced by CdO is treated theoretically as approximately the chemical potential minus the optical potential. These potentials are assumed to be dependent on the partial pressure of oxygen in the cadmium deposition process since the shift depends on this pressure. We obtain an approximate relationship for the electron-hole scattering length from that (which is established here as main result) the chemical potential is roughly null when the CdO electron concentration is maximum, which (as we will show) is equivalent to say that the chemical potential becomes approximately zero if the optical transmittance in CdO is maximal. © 2015 Elsevier B.V. All rights reserved.

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