New Al2O3:C,Mg crystals for radiophotoluminescent dosimetry and optical imaging.
New Al2O3:C,Mg crystals for radiophotoluminescent dosimetry and optical imaging.
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用于放射光致发光剂量测定和光学成像的新型 Al2O3:C,Mg 晶体。
DOI：
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发表时间：
2006
影响因子：
1
通讯作者：
A. E. Akselrod
中科院分区：
文献类型：
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作者：
M. Akselrod;A. E. Akselrod
本文报道了一种新的具有聚集氧空位缺陷的Al_2 O_3：C，Mg辐射光致发光材料的光学和剂量学特性。Al_2O_3：C，Mg晶体具有几个新的光学吸收和发射带。这表明该材料的主要光学性质是由于形成了由两个氧空位和两个Mg杂质原子组成的聚集缺陷。辐射诱导的光学吸收带集中在335和620 nm处，并在750 nm处产生荧光发射，寿命为75 +/- 5 ns。通过用335 nm或650 nm光照射Al 2 O3：C，Mg晶体并通过测量750 nm荧光的强度来进行剂量测量。探测器材料在照射前后对室内光不敏感，陷阱在高达600摄氏度的温度下稳定。证明了5 m戈伊和200戈伊之间的剂量测量范围，适用于治疗放射学应用。短的发光寿命和非破坏性读出有利于成像应用。
Optical and dosimetric properties of a new radiophotoluminescent material based on aluminum oxide doped with carbon and magnesium (Al2O3:C,Mg) and having aggregate oxygen vacancy defects are presented. The Al2O3:C,Mg crystals are characterized by several new optical absorption and emission bands. It is suggested that the main optical properties of this material are due to the formation of aggregate defects composed of two oxygen vacancies and two Mg-impurity atoms. Radiation-induced optical absorption bands are centered at 335 and 620 nm and produce fluorescent emission at 750 nm with a 75 +/- 5 ns lifetime. The dose measurements are performed by illumination of the Al2O3:C,Mg crystal with 335 nm or 650 nm light and by measuring the intensity of the 750 nm fluorescence. The detector material is insensitive to room light before and after the irradiation and the traps are stable up to 600 degrees C. A dose measurement range between 5 mGy and 200 Gy, suitable for therapeutic radiology applications, was demonstrated. The short luminescent lifetime and nondestructive readout is favorable for imaging applications.