Archive for the ‘Meccanica Quantistica’ Category

Problemi unidimensionali in Meccanica quantistica

sabato, Marzo 19th, 2022

meccanica quantistica, problemi unidimensionali


Argomenti:

  • Introduzione
  • Particella libera
  • Autofunzioni dell'energia
  • L'algebra dei ket conosce l'Analisi di Fourier
  • Uno spettroscopio matematico
  • Un paio di casi particolari
  • Particella su un segmento
  • Dinamica quantistica di una particella in moto unidimensionale
  • Moto di un pacchetto d'onde
  • Velocità di gruppo
  • Sparpagliamento di un pacchetto d'onde. Il fenomeno della dispersione
  • Alcuni esercizi svolti
  • Calcolo di integrali gaussiani

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A possible model of cold fusion

sabato, Marzo 12th, 2022

A possible model of cold fusion


We report the fusion reactions bearing the "helium 4 signature" resulting in the release of energy:

where: p=proton, n=neutron, d=(np)=deuteron (deuterium nucleus), t=(nnp) (tritium nucleus).

That said, a sample of Palladium of volume V is "charged" (through an electrochemical process) with deuterium. For our purposes, we refer to N pairs of deuterons. We schematize this system of N pairs, through an ideal gas, i.e. whose constituents do not interact. Following the standard approach for the study of these problems, we write the Hamiltonian operator of a single constituent (that is, of a single pair of deuterons). Since the single deuteron has electric charge e (where e>0 is the absolute value of the electron charge), the elements of a single pair interact through a repulsive Coulomb potential. Precisely, with obvious meaning of the terms


with


Turning to the relative coordinate system and the center of mass, and neglecting the motion of the latter:

We have

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