Creation of photostimulable centers in BaFBr:Eu2+ single crystals by vacuum ultraviolet radiation.
Creation of photostimulable centers in BaFBr:Eu2+ single crystals by vacuum ultraviolet radiation.
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通过真空紫外辐射在 BaFBr:Eu2 单晶中创建光刺激中心。
DOI：
10.1103/physrevlett.65.2438
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发表时间：
1990
影响因子：
8.6
通讯作者：
Saile
中科院分区：
文献类型：
--
作者：
Rueter;Seggern;Reininger;Saile
为了了解BaFBr: eu2 +单晶中光刺激中心（PS）的产生和读出机制，进行了一些实验。从激发第一价激子所需的最小能量6.7 eV开始，可以有效地产生PS中心。这个激子弛豫成e-V - k （br2−）对。这种缺陷在Eu 2+附近的弛豫产生一个PS中心，即F-H（Br 2−）对。由于e-V - k对的发射与Eu 2+的吸收带之间的能量匹配，使得e-V - k对的另一个衰减通道产生了Eu 2+*的发射
Several experiments were performed in order to understand the creation and readout mechanisms of photostimulable (PS) centers in BaFBr:Eu 2+ single crystals. PS centers can be efficiently created starting from 6.7 eV, i.e., the minimal energy required to excite the first valence exciton. This exciton relaxes to an e-V k (Br 2 − ) pair. The relaxation of such a defect in the neighborhood of Eu 2+ yields a PS center, namely, an F-H(Br 2 − ) pair. An additional decay channel of the e-V k pair results in Eu 2+* emission due to the energy match between the emission of this pair and an absorption band of Eu 2+