| Autor: |
Liu, Zhiqiang, Massil, Tracy, Riesen, Hans |
| Předmět: |
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| Zdroj: |
Physics Procedia; Feb2010, Vol. 3 Issue 4, p1539-1545, 7p |
| Abstrakt: |
Abstract: Nanocrystalline BaFCl: Sm3+ is an efficient photoluminescent X-ray storage phosphor which is based on the reduction of Sm3+ to Sm2+ upon exposure to ionizing radiation. We have characterized this storage phosphor by synchrotron X-ray powder diffraction and scanning electron microscope, and have investigated it for its suitability in dosimetry and imaging. Sm2+ ions generated by X-rays in nanocrystalline and microcrystalline BaFCl: Sm3+ have been studied by spectral hole-burning to gain a better understanding of the storage mechanism. By applying 19 mW/cm2 of gating light in the hole-burning process, a gating efficiency of 5.5 is achieved for nanocrystalline BaFCl: Sm2+. The microcrystalline BaFCl: Sm2+ obtained by a high-temperature method has higher efficiencies both in self- and photon-gated hole-burning. [Copyright &y& Elsevier] |
| Databáze: |
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