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| 电子辐照BaF_2晶体的正电子寿命谱研究(英文) | |
| 引用本文： | 陈世国,令狐荣锋,张晋,张一云.电子辐照BaF_2晶体的正电子寿命谱研究(英文)[J].贵州师范大学学报(自然科学版),2006,24(2):99-103. |
| 作者姓名： | 陈世国 令狐荣锋 张晋 张一云 |
| 作者单位： | 1. 贵州师范大学,理学院,贵州,贵阳,550001 2. 云南大学,物理学,云南,昆明,650091 3. 四川大学,物理科学与技术学院,四川,成都,610064 |
| 摘 要： | 用不同能量和注量的电子辐照BaF2∶Sr晶体,分别测量了辐照前后的正电子寿命谱和吸收谱。为了与正电子寿命谱结果对比,也测量了相应的荧光谱。结果表明,在能量为1.5MeV和1.8MeV,注量为1.25×1015到2.57×1016e-cm-2mai的电子辐照情况下,在BaF2∶Sr晶体中主要产生F-H对,F色心和其它一些由杂质引起的色心;辐照温度对这些色心的形成和演化过程有较大的影响。 |
| 关 键 词： | BaF2∶Sr晶体 电子辐照 正电子寿命 吸收谱 荧光谱 色心 |
| 文章编号： | 1004-5570（2006102-0099-05 |
| 收稿时间： | 2006-03-12 |
| 修稿时间： | 2006-03-12 |
Study of the positron lifetime on BaF2 crystals irradiated with electrons |
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| CHEN Shi-guo,LINGHU Rong-feng,ZHANG Jin,ZHANG Yi-yun.Study of the positron lifetime on BaF2 crystals irradiated with electrons[J].Journal of Guizhou Normal University(Natural Sciences),2006,24(2):99-103. | |
| Authors: | CHEN Shi-guo LINGHU Rong-feng ZHANG Jin ZHANG Yi-yun |
| Abstract: | BaF2 :physicsr crysta and chemistry. Is have been irradiated with electrons at different energies and doses. Their positron lifetimes and absorption spectra are measured and studied before and after electron irradiation. The fluorescence spectra are also measured and analyzed in order to validate the results from the positron lifetimes. The results show that the electron irradiation with energies of 1.5 and 1.8 MeV at the doses of 1.25 × 1015 - to- 2.57 × 1016 e-cm -2 mainly induces F-H pairs, F color centers and other color centers interfered by impurities in BaF2: Sr crystals. The study suggests that the irradiation temperature greatly influencs the forming and evolving processes of these color centers |
| Keywords: | BaF2 Sr crystal electron irradiation positron lifetime absorption spectrum fluorescence spectrum color center |
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