Proton polarization of a butanal 5% H₂O-EHBA-Cr(V) polarized target have been measured by elastic scattering to an accuracy of ± 2%. The four cubic centimeter target sample, suspended in a 25 KG field, was cooled by a pumped ³He refrigerator. Left right asymmetry of scattered particles were detected by a two arm telescope, each arm consisting of a MWPC and a plastic scintillator. Separation of elastic two body events in hydrogen from non-elastic two body events in nonhydrogenous material was achieved using a coplanarity test. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

No description available.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1950. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 80-82).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1963. / Typescript. Includes abstract and vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 123-124).

Orientador: George Emanuel Avraam Matsas / Resumo: Ao longo desta tese, modelamos alguns processos de Física de Partículas governados pela interação fraca introduzindo, para isso, o conceito de correntes semi-clássicas e acoplando-as a campos quânticos fermiônicos. Dessa maneira, analisamos a influência que a aceleração exerce sobre as desinte- grações de prótons e nêutrons segundo os processos P'SETA'N"EPOT.+'''nü'IND.E' e N'SETA'P"EPOT.-'''nü'IND.E', respectivamente, assim como descritas por observadores inerciais. Entre outros resultados, obtemos o tempo próprio de vida média de prótons e nêutrons uniformemente acelerados. Embora possa ser desprezada sob condições terrestres, mostramos que a desintegração de prótons acelerados e potencialmente importante em algumas situações astrofísicas. Utilizando técnicas de Teoria Quântica de Campos em Espaços Curvos, analisamos a desintegração de prótons e nêutrons uniformemente acelerados também sob a ótica de observadores co-acelerados. Uma vez assumida a validade do efeito Fulling-Davies-Unruh, conseguimos reconciliar as descrições inercial e co-acelerada para as transições P'SETA'N e N'SETA'P, embora as interpretações em termos de partículas elementares sejam drasticamente distintas. Como veremos, um ingrediente crucial para se obter tal consistência é a existência de partículas massivas livres que violam a equação de energia de Einstein, i.e., partículas livres com massa de repouso m e energia total E< M'CPOT.2', que é um aspecto geral da quantização em espaços curvos e referenciais acelerados. Abordamos, então,a questão da detecção de tais partículas, utilizando, para isso, uma corrente escalar semi-clássica como detector. Por fim, consideramos, utilizando um modelo simplificado, a influência que o campo gravitacional de estrelas de nêutrons pode exercer sobre o processo de neutronização P'Epot.-''SETA''ETA''nüIND.E' que é um...(Resumo completo, clicar acesso eletrônico abaixo) / Abstract: In the present thesis, we model some weak interaction processes of Particle Physics by defining the concept of semiclassical currents and coupling them to fermionic quantum fields. In this context, we analyze the influence of acceleration on proton and neutron decays due to processes P'SETA'N"EPOT.+'''nü'IND.E'and N'SETA'P"EPOT.-'''nü'IND.E, respectively, as described by inertial observers. Among other results, we obtain the mean proper lifetime of uniformly accelerated protons and neutrons. Although it can be neglected under Earth conditions, we show that the decay of accelerated protons is potentially important in some astrophysical situations. By using Quantum-Field-Theory-in-Curved-Spacetimes technics, we analyze also the decay of uniformly accelerated protons and neutrons according to coaccelerated observers. Assuming the validity of the Fulling-davies-Unruh effect, we are able to reconcile and coaccelerated descriptions of P'SETA'N e N'SETA'P transitions, even though their elementary particle interpretations are pretty distinct. As we shall see, a crucial ingredient to obtain such consistency is the exixtence of free massive particles which violate the Einstein energy euation, i.e., free particles with mass m E< M'CPOT.2', which is a general feature of quantization in curved spacetimes and accelerated frames. Thus, we analyze the detectability of such particles using a semiclassical sclar current as detectot device. Finally, we consider, using a "toy model", the influence of the gravitational field of neutron stars on the neutronization process P'Epot.-''SETA''ETA''nüIND.E' which is an important cooling mechanism...(Complete abstract click electronic access below) / Doutor

A modified version of the coupled-channel computer code CHUCK has been employed to calculate theoretical angular distributions for the inelastic scattering protons by 40 Ca, 90Zr, and 208Pb. Utilizing the vibrational collective model, with optical-model parameters generated by an optimized fit to the elastic data, angular distributions of differential cross-sections for excitations from the ground state to the first 3ˉ state of 40Ca, 90Zr and 208Pb have been calculated. These calculated angular distributions, for protons incident upon 40Ca at 135 and 160 MeV, 90Zr at 135 MeV, and 208Pb at 80, 121 and 160 MeV are compared to experimental data taken at the Indiana University Cyclotron Facility. Various treatments of the spin-orbit interaction have been investigated. Results of the study clearly demonstrate a breakdown of the collective model at higher energies of the incident projectile.

No description available.

Proefschrift--Utrecht. / Summary in English. Bibliography: p. 79-[80].

No description available.

No description available.