Radiophotoluminescence phenomenon in copper-doped aluminoborosilicate glass
Radiophotoluminescence phenomenon in copper-doped aluminoborosilicate glass
复制标题
铜掺杂铝硼硅酸盐玻璃中的放射光致发光现象
DOI：
10.1111/jace.16027
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发表时间：
2018
影响因子：
3.9
通讯作者：
Kadono Kohei
中科院分区：
文献类型：
--
作者：
Hashikawa Ryo;Fujii Yasuhiro;Kinomura Atsushi;Saito Takeshi;Okada Arifumi;Wakasugi Takashi;Kadono Kohei
辐射光致发光现象已被广泛研究的各种类型的材料的剂量学应用。我们报道了含0.005mol%铜的铝硼硅酸盐玻璃在X射线和γ射线照射下在可见光区表现出强烈的光致发光。发光归属于Cu+的3d 94 s1 → 3d 10跃迁。使用60 Co γ射线辐照，确认了高达0.5 kGy的诱导光致发光强度与辐照剂量的比例。基于光谱分析结果，提出了一种可能的光致发光增强机制。暴露于电离辐射在玻璃中产生电子-空穴对，并且电子随后被Cu 2+离子捕获，其转化为Cu+并发射发光。对于含有0.01摩尔%铜的玻璃，没有观察到光致发光的显著增强，因为逆反应，即，由Cu+离子捕获空穴，变得突出。对于保持在室温下的玻璃，甚至对于在150°C下热处理的玻璃，稳定地观察到由照射诱导的光致发光。然而，通过在500°C的温度下进行热处理，可以消除诱导的光致发光，并且玻璃返回到初始照射前状态。Cu掺杂的铝硼硅酸盐玻璃是用于剂量测定应用的潜在候选物。
Radiophotoluminescence phenomena have been widely investigated on various types of materials for dosimetry applications. We report that an aluminoborosilicate glass containing 0.005 mol% copper exhibits intense photoluminescence in the visible region induced by X‐ray and γ‐ray irradiation. The luminescence is assigned to the 3d94s1→ 3d10transition of Cu+. The proportionality of the intensity of the induced photoluminescence to the irradiation dose was confirmed up to 0.5 kGy using60Co γ‐ray irradiation. Based on the spectroscopic results, a potential mechanism was proposed for the enhancement of the photoluminescence. The exposure to the ionizing radiation generates electron‐hole pairs in the glass, and the electrons are subsequently captured by the Cu2+ions, which are converted to Cu+and emit the luminescence. For the glass containing 0.01 mol% copper, the pronounced enhancement of the photoluminescence was not observed because the reverse reaction, ie, the capture of the holes by the Cu+ions, becomes prominent. The photoluminescence induced by the irradiation was stably observed for the glasses kept at room temperature and even for the glasses heat‐treated at 150°C. However, the induced photoluminescence could be eliminated by the heat treatment at a temperature at 500°C, and the glass returned to the initial pre‐irradiation state. The Cu‐doped aluminoborosilicate glass is a potential candidate for use in dosimetry applications.