KMgF3及KMgF3：Eu^2＋晶体的射线辐照效应

KMgF3F Eu晶体中Eu^3＋→Eu^2＋的转换率在低浓度掺杂时接近100％，完全转换的饱和掺杂摩尔分数为0．29％．实验条件下，KMgF，晶体的X射线1h辐照损伤可在约100h后恢复；KMgF3：Eu^2＋晶体经X射线辐照后，360nm锐峰发射强度略有降低．不同剂量的γ射线辐照，KMgF3晶体热释光曲线的各个温度峰强度变化明显不同，即使小剂量辐照，造成的损伤也较难恢复，如γ射线辐照剂量为10^3Gy时，辐照损伤的恢复时间约需30d．KMgF3：Eu^2＋晶体360nm锐峰发射强度随γ射线辐照剂量增大

The conversion of Eu3+-> Eu2+ in KMgF3:Eu is almost 100% at the low dopant concentration and the saturant dopant is 0.29% molar fraction. The irradiation damage of KMgF3 crystal by I It X-ray irradiation can recover in about 100 h under experimental condition. After KMgF3:Eu2+ crystal was irradiated by X-ray, the sharp peak emission intensity at about 360 nm cuts down slightly. and the stimulated spectrum was not observed. The changes are obviously different for all the temperature peak intensities of TLS glow curves of KMgF3 crystal irradiated by gamma-ray of different dosages, even if the damage caused by a little dosage irradiation is relatively hard to recover, for example, if the dosage of gamma-ray irradiation is 10(3) Gy, the recovery time of irradiation damage is about 30 d. The sharp peak emission intensity at 360 nm drops linearly with the growth of gamma-ray irradiation dosage.