Produção Nacional
Interação quadrupolar e sua correlação com o efeito Mössbauer
1982; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 4; Issue: 4 Linguagem: Inglês
10.5902/2179460x24923
ISSN2179-460X
Autores Tópico(s)Quantum and Classical Electrodynamics
ResumoBy means multipole expansion, we guess the concept of "multipole moment". They are given examples of multipole moments. We start of them to define the "quadruploe moment tensor". By starting from the classical chargedents distribution of loads ρ (r-> ') and from the potencial expanded in a Taylor series, in which one one of the terms allows us to see the quadrupole moment, we construct a classical Hamiltonian in terms of quadrupole. The quantum-mechanical expression ĤQ por HQ is given, by substitution of the classical charge density ρ (r->) by an operator ρ (op), which describes adequately the real configuration in a non-continuous charge distribution. By use of the Clebsh-Gordan tecnology-coefficients with the irredutible tensors, the matrix-elements of ĤQ was calculated. The relation develloped, which allows the calcule of the matrix-elements of ĤQ, this is used for an application to a specific case, of a strong mafnetic field exerted on an atom. It is obtained a particular relation, for calculating the energy levels of quadrupolar interaction. The sequente purpose was to work out an application for an atom or ion in the fundamental staton 2S1/2, and nuclear spin 3/2 in a strong magnetic field.The results was a splitting in energy levels for the quadrupolar interaction. The quadrupolar interaction was examined in correlation of the Mössbauer-Effect in different examples.
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