选取Ce~(3+)为激活剂离子,锂-6和硼-10为靶核核素分别研制了可用于热中子探测的玻璃闪烁体,并系统研究了其发光性能及部分核物理性能.研究结果表明,Ce~(3+)激活的锂-6玻璃闪烁体具有较长的发射波长(390nm),较短的衰减时间(46.9ns)以及良好的γ射线甄别性能和温度效应,是探测热中子优良的玻璃基质材料.靶核核素与激活剂离子在锂-6玻璃闪烁体中均有一较佳的浓度范围,浓度过大将产生不同程度的淬灭效应.
Activator ion Ce~(3+) ,target nuclide lithium-6 and boron-10 are selected to produce glass scintillator respectively that can be used for thermal neutron detection,and its light-emitting property and some nuclear physics performance are also systematically studied. The study shows that lithium-6 glass scintillator activated by Ce~(3+) is a kind of glass matrix material for detection of the thermal neutron excellence, with a longer emission wavelength (390nm),a shorter lifetime (46. 9ns) and good γ-ray screening performance and temperature effect. Both of the nuclear target nuclide and activator ion in the lithium -6 glass scintillator have a maximum allowable concentration,higher than which can produce varying degrees of concentration quenching effect.
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