光照激发对夜光纤维余辉和热释光特性的影响

 本文研究了光照激发条件对夜光PET纤维余辉和热释光性能的影响，采用长余辉测试仪、微机热释光剂量仪对纤维的余辉衰减规律和热释光性能进行表征。结果表明，光照激发条件对纤维的初始发光亮度和余辉时间产生了影响，但并未呈现线性变化，激发照度变大时，纤维的余辉衰减速度快，衰减到同一发光照度时所用的时间较短，增加激发时间并不能延长材料的余辉时间。光照激发条件不改变SrAl204：Eu2+，Dy3+陷阱能级的深度，却能够显著地增加原有陷阱能级中电子的浓度。激发光强越大，激发时间越长，热释光的相对强度越大。

Influence of light excitation on afterglow and thermoluminescence characteristics of luminous fiber

In this research, the effect of light excitation conditions on the afterglow and thermoluminescent performance of luminescent polyester fiber have been studied. The afterglow decay laws and thermoluminescent characteristics of the fiber were measured by afterglow tester and TL dosimeter. The results indicated that light excitation conditions had impacts on the initial intensity and decay time of the fiber, which had not showed linear change yet. The higher the excitation intensity is, the faster the decay speed is and the shorter the decay time attaining to the same luminescent illumination is. Increasing the excitation time did not prolong the decay time of materials. The light excitation conditions did not change the trap level depth of SrAl204Eu2+，Dy3, but increase the electronic concentration of the trap level obviously.The greater the excitation intensity and the longer the excitation time are, the higher the relative intensity of thermoluminescent peak is.