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Master's Dissertation
DOI
10.11606/D.54.1983.tde-27072009-113350
Document
Author
Full name
José Renato Jurkevicz Delben
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1983
Supervisor
Committee
Panepucci, Horacio Carlos (President)
Guimarães Filho, Alberto Passos
Oliveira, Luiz Nunes de
Title in Portuguese
Mecanismos de relaxação spin-nuclear-rede em CaF2:U3+.
Keywords in Portuguese
Condutor ionico
NMR
Relaxação
Abstract in Portuguese
Neste trabalho descreve-se a construção de dois equipamentos controladores da temperatura da amostra, que operam entre 77K e 300K e entre 300K e 700K. Apresenta-se os resultados de medidas de T1 e T2, no intervalo de 77K e 700K, realizadas com o campo estático Ho paralelo à direção [111] e uma radiofreqüência de 24MHz. Discutem-se os comportamentos de T1 e T2 neste intervalo de temperaturas e os possíveis mecanismos de relaxação, spin nu clear-rede e spin eletrônico de impureza-rede, atuantes.
Title in English
Nuclear-spin-lattice relaxation mechanics for CaF2:U3+.
Keywords in English
Ionic conductor
NMR
Relaxation
Abstract in English
In this work we describe the construction of two sample temperature controlled equipments that operate between 77K and 300K and between 300K and 700K. We show the results of T1 and T2 measurements over the temperature range of 77K to 700K with the static field Ho parallel to [111] direction and 24MHz. We discuss the T1 and T2 behavior in this range temperature and the possible relaxation mechanisms of spin nuclear and spin electronic of impurity to lattice that are present.
 
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JoseRenatoDelbenM.PDf (2.01 Mbytes)
Publishing Date
2009-08-14
 
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