Gd/ sub2 /(SiO/ sub4 /)O:Ce闪烁体中的能量传递机理

1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference Pub Date : 1993-10-31 DOI:10.1109/NSSMIC.1993.701640

H. Suzuki, T. Tombrello, C. Melcher, J. Schweitzer

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引用次数: 29

摘要

掺铈氧化硅酸钆Gd/sub 2/(SiO/sub 4/)O:Ce的闪烁衰减由于Gd向Ce的能量转移而延长。为了研究Gd在闪烁过程中的作用，我们将Gd部分替换为不具有光学活性的稀土元素Y和Lu，并利用紫外和伽马射线激发测量了Gd到Ce的有效转移速率作为Gd和Ce浓度的函数。数据清楚地表明，在从Gd到Ce的能量传递过程中，Y和Lu对Gd的稀释进一步延长了Gd通过Gd的迁移时间。>

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Energy Transfer Mechanism In Gd/sub 2/(SiO/sub 4/)O:Ce Scintillators

The scintillation decay of cerium-doped gadolinium oxyorthosilicate Gd/sub 2/(SiO/sub 4/)O:Ce is lengthened by the energy transfer from Gd to Ce. To investigate the role of the Gd in the scintillation processes, the Gd was partially replaced by optically inactive rare earth elements, Y and Lu, and the effective transfer rates from Gd to Ce were measured as a function of Gd and Ce concentrations using UV- and gamma-ray excitations. The data clearly indicate the dilution of the Gd by the Y and the Lu further lengthens the migration time through the Gd in the energy transfer process from Gd to Ce. >

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1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference

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