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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:06 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Thermoluminescence aspects of salt from slanic deposits (II)
Authors:
Claudia Mariana Gomoiu (1), Alexandru Jipa(2), Romul Margineanu (1), Bogdan Mitrica (1), Ana-Maria Blebea-Apostu (1)
Affiliation:
(1) Horia Hulubei National Institute of R&D in Physics and Nuclear Engineering, Magurele, Ilfov
(2) University from Bucharest, Faculty of Physics
E-mail
cgomoiu@gmail.com
Keywords:
Thermoluminescence, natural salt rock, TLD, NaCl
Abstract:
Due to its great spreading and low cost rock salt has been the object of study of many scientific researchers who have tried to demonstrate that, due to its properties, salt could be an excellent dosimeter. Salt, like other crystals with impurities, shows the phenomenon of thermoluminescence. Thermoluminescence phenomenon is the phenomenon of light radiation emission by some solids that have been exposed to a radiation dose, following the controlled heating. The interaction of radiation with solid body have the effect of appearance of ionization, excitation and movement processes. These processes occurring after irradiation produced a series of changes in the solid grid, changes called defects which act as traps for electrons and holes. After warming some of the electrons are released from the traps and recombine with the emission of radiation light. In this paper we intend to study the thermoluminescence properties of rock salt, and the correlation between the TL emission of salt samples, TL emission of TL detectors and the muon flux. For this purpose a series of measurements have been done, namely: dosimetry measurements on TL detector, dosimetry measurements on samples of salt and measurements and simulations of muons flux. Of vital importance for this study is the natural background radiation that is determined by the concentration of impurities contained in rock salt and the flux of atmospheric muons (hard component of cosmic radiation) passing through the layer of the rock and reach in the underground. In the salt ore from Slanic Prahova the concentration of impurities varies between 0.5% and 2%. For this study the salt samples were taken at each level of the mine Cantacuzino, levels at which TL detectors were exposed.The calculation shows that correlation coefficient has a value of 0,83 for TLD - NaCl, 0.91 for TLD - muons and 0.98 for NaCl - muons, values which demonstrates that between them there is a strong positive correlation.
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