Speaker
Ms
Joyful Mdhluli
(University of the Witwatersrand)
Description
Composite scintillators are new promising detectors for use in severe radiation environments. They consist of crystal granules embedded into an optical transparent medium. This ensures a high radiation hardness within the scintillator with comparison to normal plastic scintillators. However, composite scintillators are low opacity materials as a result of the light scattered by the small crystal granules.
We report on optical and structural properties of these composite scintillators after irradiation using a neutron beam of above 1*10^(14) n/cm^(2) generated by the IBR-2 reactor at the Frank Laboratory of Neutron Physics in Dubna, Russia. The irradiation effects were characterized using Raman spectroscopy, Light yield and Light Transmission measurements. We further report on the advantages and disadvantages of these composite scintillators; and problems that need to be addressed. Preliminary results indicate a change in the light yield and light transmission after a certain neutron flux whilst no structural changes where observed from the Raman spectroscopy results.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Main supervisor (name and email)<br>and his / her institution
Elias Sideras-Haddad, Elias.Sideras-Haddad@wits.ac.za, University of the Witwatersrand
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Primary author
Ms
Joyful Mdhluli
(University of the Witwatersrand)
Co-authors
Dr
Andrey Boyarintsev
(Institute for Scintillation Materials of NAS of Ukraine)
Prof.
Bruce Mellado
(University of the Witwatersrand)
Prof.
ELIAS SIDERAS-HADDAD
(University of the Witwatersrand)
Ms
Harshna Jivan
(University of the Witwatersrand)
Dr
Ilya Vasiliev
(Joint Institute for Nuclear Research)
Dr
Rudolph Erasmus
(University of the Witwatersrand)
Mr
Skhathisomusa Mthembu
(University of the Witwatersrand)
Dr
Tatiana Nepokupnaya
(Institute for Scintillation Materials of NAS of Ukraine)
Mr
Vladimir Baranov
(Joint Institute for Nuclear Research)
Dr
Yuri Davydov
(Joint Institue for Nuclear Research)
Dr
Yuri Onufriyev
(Institute for Scintillation Materials of NAS of Ukraine)
