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Luiz Carlos Oliveira

Luiz Carlos Oliveira
MRA Industria de equipamentos eletronicos ltda

PhD

About

26
Publications
3,501
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554
Citations
Introduction
My present research concerns on the development and characterization of luminescent material for application in dosimetry such as: personal and medical dosimetry as well as in the development of phosphors for temperature sensing.
Additional affiliations
September 2018 - March 2021
MRA industria de equipamentos eletronicos
Position
  • Reseacher and Developer Staff
Description
  • In this position, I´m working in the development of a new optically stimulated luminescence dosimetry system for personal monitoring from screech. Among the tasks are the development of the radiation detector, the badge, the instrumentation and the progradation of the microcontroller.
March 2013 - March 2018
University of São Paulo
Position
  • Researcher
March 2010 - present
Oklahoma State University - Stillwater
Position
  • Developmento of phosphors for Dosimetry and and medical application
Education
March 2006 - March 2010
University of São Paulo
Field of study
  • Medical Physics
March 2003 - March 2005
Universidade Federal de Sergipe
Field of study
  • Interaction of radiation with matter
March 1997 - March 2002

Publications

Publications (26)
Article
The objective of this work was to investigate the thermoluminescence (TL) properties of lanthanide-doped CaSO4 synthesized by co-precipitation for particle temperature sensing applications. Desirable properties for temperature sensing include high TL intensity, stability of the TL signal against light exposure, low room temperature fading, UV emiss...
Article
In this work we systematically investigated undoped and lanthanide(Ln)-doped MgO with diverse dopant combinations, MgO:Ce,Ln and MgO:Tb,Ln, where Ln=Eu, Yb, Tm, Sm, Dy, Nd, as well as the same combinations with an additional 3 mol% Li dopant. We characterized the thermoluminescence (TL), optically stimulated luminescence (OSL), radioluminescence (R...
Article
The knowledge of the thermoluminescence and radioluminescence spectra is important for understand-ing the nature of luminescence emitted by thermoluminescent dosimeters and scintillators. In view ofthat, an instrument that records these two types of spectra was developed. Mechanical and structuralparts as well as a description of each component of...
Article
An investigation of the luminescent properties of undoped and rare earth (RE) singly- and co-doped YF3 was carried out by means of radioluminescence (RL) and thermoluminescence (TL) measurements. Materials were obtained by ligand-free co-precipitation with Ce, Tm, Tb or Eu substituting for Y, followed by calcination in air at 500 °C for 1 h. RL mea...
Article
The goal of the present investigation is to explore the optically stimulated luminescent (OSL) properties of CaB6O10:Ce,LiCl in order to verify its viability as detector of ionizing radiation. Here, we investigate basic dosimetric and luminescent properties of this material. To this end, we carried out radioluminescence (RL), thermoluminescence (TL...
Article
The objective of this work was to develop a new optically stimulated luminescence (OSL) material for dosimetry applications that is tissue equivalent and has high sensitivity to ionizing radiation, fast luminescence lifetime, and intrinsic neutron sensitivity. To achieve this combination of properties, we started with a host material with low effec...
Article
Full-text available
The goal of this work was to investigate the relevant dosimetric and luminescent properties of MgO:Li 3%,Ce 0.03%,Sm 0.03%, a newly-developed, high sensitivity Optically Stimulated Luminescence (OSL) material of low effective atomic number (Z eff = 10.8) and potential interest for medical and personal dosimetry. We characterized the thermoluminesce...
Article
With the aim of developing a new phosphor for temperature sensing, the effect of different annealing processes and co-dopants (Ag, In, Dy or Ti) on the TL properties of copper-doped Li2B4O7 synthesized by Solution Combustion Synthesis was investigated. Compared with slow annealing, fast annealing induces a high temperature peak (310 °C) in the TL c...
Article
The objective of this work is to characterize three thermoluminescent (TL) materials synthesized in our laboratory and identified as having properties suitable for temperature sensing, including bright TL emission, low fading at room temperature and lowl ight-induced fading(bleaching) of theTL signal.They are lithium borate doped with copper and s...
Article
The radioluminescence (RL) and thermoluminescence (TL) activation of MgF2 through the incorporation of rare earths is investigated in this work. These materials were obtained by ligand-free solution precipitation and calcination at 500 °C in air, and Ce, Eu and Tb were incorporated at the 1 mol% level. RL results of doped and undoped materials seem...
Article
The objective of this work is to investigate MgO:Nd,Li synthesized by solution combustion synthesis (SCS) as an optically stimulated luminescence (OSL) material for 2D dosimetry. We characterized the thermoluminescence (TL), OSL, radioluminescence (RL), OSL emission spectrum, and OSL luminescence lifetime of MgO:Nd,Li. We also carried out a prelimi...
Article
This paper presents an overview of a systematic study to develop new thermoluminescence (TL) and optically stimulated luminescence (OSL) materials using solution combustion synthesis (SCS) for applications such as personal OSL dosimetry, 2D dose mapping, and temperature sensing. A discussion on the material requirements for these applications is in...
Article
Full-text available
The objective of this work is to test a model-guided approach, coupled with an efficient material synthesis method, for the development of new thermoluminescent (TL) material using yttrium aluminum garnet (YAG, Y3Al5O12) as a model material. We systematically investigated undoped and lanthanide-doped YAG using x-ray diffraction (XRD), TL, and radio...
Data
The objective of this work is to test a model-guided approach, coupled with an efficient material synthesis method, for the development of new thermoluminescent (TL) material using yttrium aluminum garnet (YAG, Y3Al5O12) as a model material. We systematically investigated undoped and lanthanide-doped YAG using x-ray diffraction (XRD), TL, and radio...
Article
Full-text available
Intensity of the 150°C thermoluminescence peak of beta-irradiated carbonated synthetic A-type hydroxyapatite is approximately 12 times higher than that of the noncarbonated material. Deconvolution of the glow curve showed that this peak is a result of a trap distribution. An attempt was made to relate this thermoluminescence peak enhanced by carbon...
Article
The objective of this study is to explore the possibility of synthesizing MgO with controlled luminescence and thermoluminescence (TL) properties using the Solution Combustion Synthesis (SCS) method by doping with different lanthanides (Ln) and co-doping with lithium (Li). The goal is to further establish the SCS technique as a new route for develo...
Article
Full-text available
The study of radiation defects created in biomaterials, such as bone and teeth, can be used in dating with importance to palaeontology and archaeology. Two Stegomastodon teeth (AL1 and AL2) from north-eastern Brazilian megafauna were studied by electron spin resonance (ESR) spectroscopy. The samples were collected in Fazenda Ovo da Ema, (913349 / 3...
Article
Magnetic susceptibility (χ, mass specific) is useful for easy indirect estimation of other soil properties at a low cost. The aim of this study was to assess the use of χ as measured with an analytical balance for predicting properties with a substantial influence on the management of Typic Haplustalfs in southern Brazil. To achieve this 48 topsoil...
Article
The fossiliferous deposits in the coastal plain of the Rio Grande do Sul State, Southern Brazil, have been known since the late XIX century; however, the biostratigraphic and chronostratigraphic context is still poorly understood. The present work describes the results of electron spin resonance (ESR) dating in eleven fossil teeth of three extinct...
Article
Dose evaluation by electron spin resonance (ESR) is usually accomplished by constructing a dose-response curve by measuring the peak-to-peak intensity of the dosimetric signals in the g = 2 region. In several cases, this signal is overlapped with others that can interfere with dose reconstruction. In this work a new method to correct the spectrum b...

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