| Full text | |
| Author(s): |
Nunes, M. C. S.
[1]
;
Lima, L. S.
[2]
;
Yoshimura, E. M.
[2]
;
Franca, L. V. S.
[3]
;
Baffa, O.
[3]
;
Jacobsohn, L. G.
[4]
;
Malthez, A. L. M. C.
[5]
;
Kunzel, R.
[6]
;
Trindade, N. M.
[2, 1]
Total Authors: 9
|
| Affiliation: | [1] Fed Inst Educ Sci & Technol Sao Paulo, Dept Phys, Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Phys, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, FFCLRP, Dept Phys, Ribeirao Preto, SP - Brazil
[4] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC - USA
[5] Univ Tecnol Fed Parana, Dept Phys, Curitiba, PR - Brazil
[6] Univ Fed Sao Paulo, Dept Phys, Diadema, SP - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Journal of Luminescence; v. 226, OCT 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Alexandrite mineral (BeAl2O4:Cr3+) powder incorporated in a fluorinated polymer was prepared in the form of pellets. A mixture with 20 wt% of the alexandrite in the pellet had the luminescence behavior evaluated as a function of exposure to ionizing radiation using the optically stimulated luminescence (OSL) technique. The OSL measurements were evaluated in terms of dose-response (beta dose from 0.1 to 5 Gy), repeatability, reproducibility, and fading. The results showed that the OSL intensity signal varied linearly with the irradiation dose and that the OSL intensity suffered a strong reduction during the first five days of storage in the dark but remained stable for at least the following 30 days. Radioluminescence (RL) measurements under X-ray excitation revealed a weak luminescence within the ultraviolet-visible spectral region, while optical absorption (OA) measurements revealed the presence of Cr3+ impurities. (AU) | |
| FAPESP's process: | 19/05915-3 - Characterization of minerals for luminescent dosimetry of ionizing radiations |
| Grantee: | Neilo Marcos Trindade |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/05982-0 - R&D&I in radiation metrology in the health area |
| Grantee: | Linda Viola Ehlin Caldas |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/16894-4 - Investigation of optically stimulated luminescence of alexandrite pellets for applications in the dosimetry area |
| Grantee: | Matheus Cavalcanti dos Santos Nunes |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |