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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2016.tde-27062016-144119
Document
Author
Full name
Júlio Batista Rodrigues da Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Costa, Fábio Eduardo da (President)
Mesquita, Carlos Henrique de
Oliveira, Cristiano Luis Pinto de
Title in Portuguese
Fabricação e caracterização de detector de Barreira de superfície a partir de substrato de silício comercial
Keywords in Portuguese
detectores de radiação
semicondutores
silício
Abstract in Portuguese
Neste trabalho foram desenvolvidos detectores de radiação Barreira de superfície de silício que fossem capazes de detectar a presença da radiação gama de baixa energia proveniente de sementes de iodo-125 utilizada em tratamentos de braquiterapia. A partir de substratos comerciais de silício foram desenvolvidos os detectores, de uma sequência que partiu de tratamentos químicos nas superfícies destes substratos com a intenção de minimizar os possíveis ruídos gerados, validação das amostras obtidas como diodos, assegurando características detectoras, e a efetiva utilização como detector para fontes radioativas de iodo-125 com energia em torno de 25 kev e amerício-251 com energia na ordem de 59 kev. Finalizou realizando a análise dos espectros de energia obtidos e assim foi possível observar a capacidade destes detectores para mensuração da energia proveniente destas sementes.
Title in English
Fabrication and characterization of surface barrier detector from commercial silicon substrate
Keywords in English
radiation detectors
semiconductors
silicon
Abstract in English
In this work it was developed radiation detectors silicon surface barrier that were capable of detecting the presence of gamma radiation from a low energy of iodine-125 seeds used in brachytherapy treatments. From commercial silicon substrates detectors were developed, one sequence left of chemical treatments to the surfaces of these substrates with the intention of minimizing the possible noise generated, validation of the samples obtained as diodes, ensuring detector characteristics and effective use as detector for iodine-125 radioactive sources with energy of about 25 kev and americium-251 with energy on the order of 59 kev. Finished performing the analysis of the obtained energy spectra and so it was possible to observe the ability of these detectors to measure the energy from these seeds.
 
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Publishing Date
2016-07-01
 
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