Thesis (Ph. D.)--McMaster University (Canada), 1989. / Source: Dissertation Abstracts International, Volume: 50-11, Section: B, page: 5083. Supervisor: R.F.W. Bader.

Thesis (Ph. D.)--McMaster University (Canada), 1990. / Source: Dissertation Abstracts International, Volume: 62-13, Section: A, page: 0000.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.

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Thesis (Ph.D.)--McMaster University (Canada), 1990. / Source: Dissertation Abstracts International, Volume: 53-01, Section: B, page: 0301. Supervisor: R. F. W. Bader.

Thesis (Ph.D.)--McMaster University (Canada), 1993. / Source: Dissertation Abstracts International, Volume: 55-06, Section: B, page: 2189. Adviser: R. Bader.

Recently Wulfman found great merit in Barut's idea on atomic super-multiplets, and he introduced the concept of the generalized Hamiltonian that is the Hamiltonian of all atoms. 24 Investigating the Schrodinger equation with this generalized Hamiltonian, it should be possible to relate the properties of different atoms and find the structure of the periodic chart from fundamental principles of dynamics and group theory. One can can use the same kinds of methods for relating the properties of different states of a single hydrogen atom with the aid of the degeneracy group S0 (4) and dynamical group SO (4, 2). These groups represent the symmetries of the time-independent and time-dependent Schrodinger equations with ordinary Hamiltonian.(25,26) The idea then is to apply these methods to the system defined by a generalized Hamiltonian. In chapter II of this thesis, we will consider the classification of chemical elements, in the light of the concept of the generalized Hamiltonian. We will make a group theoretical classification based on the characteristics of the outermost electrons in the central-field model of atomic ground states. We conclude that the classification group may be SO (p,q) with p+q≧, p ≧4. In chapter III of this thesis, we will review Wulfman's work briefly and consider an application of his idea to the ground state of helium making use of the group SO (4,1) xSO (4,1). We arrive at the conclusion that we can obtain physically significant configuration mixing using SO (4,1) xSO (4,1) or SO (4,2) xSO (4,2) in a manner analogous to the way in which SO (4) xSO (4) is used to determine configuration mixing in doubly excited states of helium-like systems.

Made available in DSpace on 2016-04-28T14:16:14Z (GMT). No. of bitstreams: 1 Cesar de Barros Lobato.pdf: 3242160 bytes, checksum: ff8e620459772e7bb401803e69d4f155 (MD5) Previous issue date: 2011-10-11 / Secretaria da Educação do Estado de São Paulo / From a detailed analysis of documents, we realize that historiography does not give due importance to the concepts of caloric and atomic diameter inside the atomic theory developed by John Dalton (1766-1844). In this sense, this thesis aims mainly to show the relevance of these ideas within the Daltonian atomism. We believe they are as important as the atomic weight and need to be better discussed by historiography. Thus, seeking to validate this hypothesis, this work intends to demonstrate two things. The first is to highlight the features that make so special the atomics weights inside the atomic theory, from the point of view Dalton as the point of view of historians. The second is to show that the concept of atomic diameter amalgamated with caloric also have such characteristics and therefore are as important as the idea of atomic weight to Dalton. Through the study, we could see that from the point of view of Dalton, the ideas of atomic weight and diameter are complementary, because one explains the gravimetric results, the other, the results volumetric of the reactions / A partir de uma detalhada análise documental, percebemos que a historiografia não dá a devida importância aos conceitos de calórico e diâmetro atômico, na teoria atômica desenvolvida por John Dalton (1766-1844). Nesse sentido, esta tese tem como objetivo principal, mostrar a relevância desses conceitos dentro do atomismo Daltoniano. Acreditamos que estes são tão importantes quanto o de peso atômico e que precisam ser mais significativamente discutidos pela historiografia. Assim, buscando validar esta hipótese, pretende-se com este trabalho demonstrar duas situações. A primeira é destacar as características que tornam os pesos atômicos tão especiais dentro da teoria atômica, quer seja sob o ponto de vista de Dalton, quanto sob o ponto de vista dos Historiadores. A segunda é mostrar que o conceito de diâmetro atômico amalgamado ao de calórico, igualmente, possui tais características e que por tal razão são tão relevantes quanto à noção de peso atômico para Dalton. Por meio deste estudo, pode-se perceber que sob o ponto de vista de Dalton, as concepções de peso e diâmetro atômico são complementares, pois uma explica os resultados gravimétricos, a outra, os resultados volumétricos das reações

Made available in DSpace on 2016-04-28T14:16:30Z (GMT). No. of bitstreams: 1 cesar.pdf: 2534723 bytes, checksum: 42dc4316c541c0f1a3d5715ba1e7f141 (MD5) Previous issue date: 2007-06-12 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The purpose of this essay is to analyze some aspects of the development of the atomic theory by Dalton, focusing his main and longest work. A new system of chemical philosophy was published in 1808, 1810 and 1827, with the aim of disclosing Dalton s atomic theory and reaffirming its basis as well as presenting some answers to the objections which some of his contemporaneous historians made about his ideas. Thus, the first part of this work presents the A new system of chemical philosophy. Besides it discusses some opinions hold by historians of science concerning the uprising of Dalton s atomic theory. The second part, analyses some reasons which would leads Dalton to propose his atomic theory. Finally the third part shows how, or starting from which presupposed, Dalton proposed atomic weights, diameter and volume definitions / O propósito desta dissertação é analisar alguns aspectos da elaboração da teoria atômica de Dalton, focalizando especialmente a sua principal e mais extensa obra, A new system of chemical philosophy. Esse trabalho foi publicado em 1808, 1810 e 1827 principalmente com o intuito de divulgar a teoria atômica de Dalton e reafirmar seus fundamentos, bem como de apresentar respostas às objeções que alguns de seus contemporâneos levantaram a suas idéias. Assim a primeira parte deste trabalho apresenta o A new system of chemical philosophy além de abordar quais as principais opiniões dos historiadores da ciência que trataram do surgimento da teoria atômica. A segunda parte, analisa razões que motivaram Dalton a propor a teoria atômica. E a terceira parte mostra como, ou a partir de quais pressupostos, Dalton propôs determinações de pesos, diâmetros e volumes atômicos