In:
Journal of Applied Physics, AIP Publishing, Vol. 100, No. 3 ( 2006-08-01)
Kurzfassung:
We report the results of optical transmission, photoluminescence (PL), and radio-luminescence measurements on x ray, γ ray, and UV irradiated RbCdF3:Mn2+ single crystals with different Mn2+ concentrations. There is a radiation-induced increase in the optical absorption and PL intensity that correlates with the Mn2+ concentration. This suggests that the defect center that gives rise to the observed effect is associated with the Mn2+ ions. We propose that the defect center is an F-center where an electron is trapped at a fluorine vacancy situated near but not adjacent to the Mn2+ site. The PL intensity for UV (240–270nm), x-ray ( & lt;40keV), or γ-ray (60keV) irradiation saturates at high irradiation intensities, which can be attributed to a fixed concentration of defect sites determined by the Mn2+ concentration. We show that the radiation-induced PL intensity is correlated with the UV, x-ray, and Am241 γ-ray dose. This indicates that RbCdF3:Mn2+ has potential as a radiation dosimeter material.
Materialart:
Online-Ressource
ISSN:
0021-8979
,
1089-7550
Sprache:
Englisch
Verlag:
AIP Publishing
Publikationsdatum:
2006
ZDB Id:
220641-9
ZDB Id:
3112-4
ZDB Id:
1476463-5
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