本文主要研究内容
作者张勇,朱金铭,杨丽丽,吕世权,武彦群,楚学娟(2019)在《Dy3+对Tb3+激活硅酸盐氟氧闪烁玻璃发光性能的影响》一文中研究指出:采用高温熔融法制备了Dy3+或Tb3+单掺和Dy3+/Tb3+共掺硅酸盐氟氧闪烁玻璃。通过对傅里叶变换红外光谱、透射光谱、光致激发和发射光谱、 X射线激发发射光谱及荧光衰减曲线的分析,研究Dy3+与Tb3+之间的能量传递关系以及Dy3+对Tb3+激活硅酸盐氟氧闪烁玻璃发光性能的影响。实验结果表明:Dy3+/Tb3+共掺硅酸盐氟氧闪烁玻璃具有较高的密度和良好的可见区透过率,玻璃的网络结构是由[SiO4]四面体和[AlO4]四面体连接构成。在紫外光激发时, Dy3+单掺玻璃的发光源于Dy3+的4F9/2→6H15/2(483 nm),6H13/2(576 nm)的跃迁发射,而Tb3+单掺玻璃的发光则源于Tb3+的5D4→7F6(489 nm),7F5(544 nm),7F4(586 nm)和7F6(623 nm)的跃迁发射。对于Dy3+/Tb3+共掺玻璃,发射光谱则主要由Tb3+的荧光发射组成。通过对不同波长紫外光激发的发射光谱分析发现, Dy3+/Tb3+共掺闪烁玻璃中存在多种形式的能量传递。在以Dy3+的特征激发452 nm为激发波长时, Tb3+单掺玻璃的发光很弱。但随着Dy3+的引入,通过4F9/2(Dy3+)→5D4(Tb3+)的能量传递, Tb3+发光得到敏化增强。Dy3+/Tb3+共掺玻璃的发光强度随着Dy2O3含量的增多而增强, Dy2O3含量为1 mol%时达到最大,更高Dy2O3含量的样品由于Dy3+的浓度猝灭,减少了向Tb3+的能量传递,发光强度减弱。当激发波长减小到350 nm时, Dy3+和Tb3+均被激发到更高的能级6P7/2(Dy3+)和5L9(Tb3+),此时除了4F9/2(Dy3+)→5D4(Tb3+)的能量传递外,还出现了5D4(Tb3+)→4F9/2(Dy3+)的能量回传。Dy3+掺杂浓度较低时, Dy3+→Tb3+能量传递作用较强, Tb3+发光得到敏化增强。随着Dy2O3含量的增多, Tb3+→Dy3+能量传递作用增强。当Dy2O3含量超过0.4 mol%时, Tb3+→Dy3+能量传递强于Dy3+→Tb3+能量传递,减少了Tb3+的辐射跃迁发光,因此Dy3+/Tb3+共掺玻璃的发光强度开始减弱。由于Gd3+向Dy3+或Tb3+均可进行有效的能量传递,因此在以Gd3+的特征激发274 nm为激发光时, Dy3+/Tb3+共掺玻璃中出现了Dy3+和Tb3+对Gd3+传递能量的竞争。随着Dy2O3含量的增多, Tb3+所获得的能量不断减少,同时伴随着Tb3+→Dy3+能量回传和Dy3+之间的无辐射交叉弛豫作用, Dy3+/Tb3+共掺玻璃的发光强度不断减弱。对Dy3+/Tb3+共掺闪烁玻璃中Tb3+的5D4→7F5荧光衰减曲线分析还发现,随着Dy2O3含量的增多, Tb3+的荧光寿命从2.24 ms缩短到1.15 ms,曲线从单指数形式变为双指数形式,进一步证明玻璃中存在5D4(Tb3+)→4F9/2(Dy3+)的能量回传。X射线激发发射光谱显示, Dy3+的引入对Tb3+激活闪烁玻璃的辐射发光具有很强的负面影响,而这种负面影响不足以通过Dy3+→Tb3+能量传递来弥补,因此Dy3+/Tb3+共掺玻璃的辐射发光强度随着Dy2O3含量的增多而不断减弱。由此可见,在Tb3+激活硅酸盐氟氧闪烁玻璃中,不宜将Dy3+作为敏化剂,用于增强Tb3+的发光。
Abstract
cai yong gao wen rong rong fa zhi bei le Dy3+huo Tb3+chan can he Dy3+/Tb3+gong can gui suan yan fu yang shan shuo bo li 。tong guo dui fu li xie bian huan gong wai guang pu 、tou she guang pu 、guang zhi ji fa he fa she guang pu 、 Xshe xian ji fa fa she guang pu ji ying guang cui jian qu xian de fen xi ,yan jiu Dy3+yu Tb3+zhi jian de neng liang chuan di guan ji yi ji Dy3+dui Tb3+ji huo gui suan yan fu yang shan shuo bo li fa guang xing neng de ying xiang 。shi yan jie guo biao ming :Dy3+/Tb3+gong can gui suan yan fu yang shan shuo bo li ju you jiao gao de mi du he liang hao de ke jian ou tou guo lv ,bo li de wang lao jie gou shi you [SiO4]si mian ti he [AlO4]si mian ti lian jie gou cheng 。zai zi wai guang ji fa shi , Dy3+chan can bo li de fa guang yuan yu Dy3+de 4F9/2→6H15/2(483 nm),6H13/2(576 nm)de yue qian fa she ,er Tb3+chan can bo li de fa guang ze yuan yu Tb3+de 5D4→7F6(489 nm),7F5(544 nm),7F4(586 nm)he 7F6(623 nm)de yue qian fa she 。dui yu Dy3+/Tb3+gong can bo li ,fa she guang pu ze zhu yao you Tb3+de ying guang fa she zu cheng 。tong guo dui bu tong bo chang zi wai guang ji fa de fa she guang pu fen xi fa xian , Dy3+/Tb3+gong can shan shuo bo li zhong cun zai duo chong xing shi de neng liang chuan di 。zai yi Dy3+de te zheng ji fa 452 nmwei ji fa bo chang shi , Tb3+chan can bo li de fa guang hen ruo 。dan sui zhao Dy3+de yin ru ,tong guo 4F9/2(Dy3+)→5D4(Tb3+)de neng liang chuan di , Tb3+fa guang de dao min hua zeng jiang 。Dy3+/Tb3+gong can bo li de fa guang jiang du sui zhao Dy2O3han liang de zeng duo er zeng jiang , Dy2O3han liang wei 1 mol%shi da dao zui da ,geng gao Dy2O3han liang de yang pin you yu Dy3+de nong du cu mie ,jian shao le xiang Tb3+de neng liang chuan di ,fa guang jiang du jian ruo 。dang ji fa bo chang jian xiao dao 350 nmshi , Dy3+he Tb3+jun bei ji fa dao geng gao de neng ji 6P7/2(Dy3+)he 5L9(Tb3+),ci shi chu le 4F9/2(Dy3+)→5D4(Tb3+)de neng liang chuan di wai ,hai chu xian le 5D4(Tb3+)→4F9/2(Dy3+)de neng liang hui chuan 。Dy3+can za nong du jiao di shi , Dy3+→Tb3+neng liang chuan di zuo yong jiao jiang , Tb3+fa guang de dao min hua zeng jiang 。sui zhao Dy2O3han liang de zeng duo , Tb3+→Dy3+neng liang chuan di zuo yong zeng jiang 。dang Dy2O3han liang chao guo 0.4 mol%shi , Tb3+→Dy3+neng liang chuan di jiang yu Dy3+→Tb3+neng liang chuan di ,jian shao le Tb3+de fu she yue qian fa guang ,yin ci Dy3+/Tb3+gong can bo li de fa guang jiang du kai shi jian ruo 。you yu Gd3+xiang Dy3+huo Tb3+jun ke jin hang you xiao de neng liang chuan di ,yin ci zai yi Gd3+de te zheng ji fa 274 nmwei ji fa guang shi , Dy3+/Tb3+gong can bo li zhong chu xian le Dy3+he Tb3+dui Gd3+chuan di neng liang de jing zheng 。sui zhao Dy2O3han liang de zeng duo , Tb3+suo huo de de neng liang bu duan jian shao ,tong shi ban sui zhao Tb3+→Dy3+neng liang hui chuan he Dy3+zhi jian de mo fu she jiao cha chi yu zuo yong , Dy3+/Tb3+gong can bo li de fa guang jiang du bu duan jian ruo 。dui Dy3+/Tb3+gong can shan shuo bo li zhong Tb3+de 5D4→7F5ying guang cui jian qu xian fen xi hai fa xian ,sui zhao Dy2O3han liang de zeng duo , Tb3+de ying guang shou ming cong 2.24 mssu duan dao 1.15 ms,qu xian cong chan zhi shu xing shi bian wei shuang zhi shu xing shi ,jin yi bu zheng ming bo li zhong cun zai 5D4(Tb3+)→4F9/2(Dy3+)de neng liang hui chuan 。Xshe xian ji fa fa she guang pu xian shi , Dy3+de yin ru dui Tb3+ji huo shan shuo bo li de fu she fa guang ju you hen jiang de fu mian ying xiang ,er zhe chong fu mian ying xiang bu zu yi tong guo Dy3+→Tb3+neng liang chuan di lai mi bu ,yin ci Dy3+/Tb3+gong can bo li de fu she fa guang jiang du sui zhao Dy2O3han liang de zeng duo er bu duan jian ruo 。you ci ke jian ,zai Tb3+ji huo gui suan yan fu yang shan shuo bo li zhong ,bu yi jiang Dy3+zuo wei min hua ji ,yong yu zeng jiang Tb3+de fa guang 。
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论文作者分别是来自光谱学与光谱分析的张勇,朱金铭,杨丽丽,吕世权,武彦群,楚学娟,发表于刊物光谱学与光谱分析2019年05期论文,是一篇关于闪烁玻璃论文,共掺论文,射线激发论文,能量传递论文,光谱学与光谱分析2019年05期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自光谱学与光谱分析2019年05期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
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