Project foresees the study of Brazilian minerals for application in radiation dosimetry
Professor Neilo Trindade, from the São Paulo Campus, had an additive of around 120 thousand reais in his Research Aid, approved by the São Paulo State Research Support Foundation (Fapesp). THE initial project, approved in 2019, provides for the study of Brazilian minerals for application in radiation dosimetry.
According to Trindade, since Brazil is one of the largest producers and suppliers of a wide variety of gems in the world, there is a need to study other natural crystals, mainly national minerals, which may be useful for radiation dosimetry. Within this context, during the development of the current project, after making a strategic plan, the researcher asked Fapesp for more resources to develop a radioluminescence (RL) system.
According to Neilo, Fapesp evaluated the scientific report positively and fully approved the budget request to assemble the RL system coupled with another complementary technique, thermoluminescence, totaling approximately R $ 120 thousand. In addition, the researcher will count on the help of a technical fellow. “The agency, like IFSP, has believed in our work a lot, and this brings us a great responsibility towards the academic environment and society”, he said.
The researcher explains that luminescence is the emission of light presented by some substances when subjected to some type of stimulus, such as heat, electricity, ultraviolet (UV) or infrared light, chemical reaction or ionizing radiation, below the point of incandescence. Radioluminescence is when luminescence occurs during stimulation with ionizing radiation. Therefore, according to him, it is very useful to study luminescent materials that are used, or have potential for use, in the area of dosimetry.
According to Trindade, in the case of Brazilian minerals, which are the subject of the research, with the help of complementary techniques, it is possible to study in depth the absorbing and emitting centers, both to have reliability of the gem acquired and to correlate these elements with those that are responsible for the luminescent signal.
The project is developed in collaboration with Professor Elisabeth M. Yoshimura, from the Radiation Dosimetry and Medical Physics Group, Physics Institute of the University of São Paulo (USP), with Professor Ronaldo Santos da Silva, from the University's Physics Department Federal do Sergipe (UFS), and with Professor Luiz G. Jacobsohn, from the Materials Engineering Department at Clemson University, USA.
According to Professor Neilo, the system should be ready by October. With the resources approved by Fapesp, components such as spectrometer, X-ray source, optical fibers and photomultiplier will be purchased; later, a camera for the system will be made, and the system will be interfaced with the computer.