Ce^(3+)激活的锂-6玻璃闪烁体发光及核物理性能的研究

Luminescence and nuclear physics characteristics of lithium-6 glass scintillator activated by Ce^(3+)

选取Ce3+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,Ce3+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 Ce3＋ ,target nuclide lithium-6 and boron-10 are selected to produce glass scintillator re- spectively 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 Ce3＋ 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 7-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.