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用Bridgeman Stockbarger法生长出了掺Gd质量分数为 0 1 5 %的立方氟化铅 ( β PbF2 :Gd)晶体 .将其切割、抛光制成 2 0mm× 2 0mm的试样 ,分别用13 7Cs和AGS上强度为 1GeV的束流为激发源 ,测量了该晶体的光输出和衰减时间 .结果表明β PbF2 :Gd晶体在常温下能够产生微弱的闪烁光 ,光输出约为 6光电子 /MeV ,而且大部分光输出都是在时间门宽 <30ns的范围内测到的 ,在 1 μs范围内没有发现慢分量 .X射线激发下的发射光谱表明 ,β PbF2 :Gd晶体的 2 77和 31 2nm发光峰分别对应于Gd3 +离子的6IJ→8S7/2 和6PJ→8S7/2 能级跃迁 .
A cubic PbF2: Gd crystal doped with Gd at a mass fraction of 51.5% was grown by Bridgeman Stockbarger method, which was cut and polished into 20 mm × 20 mm specimens with 13 7Cs and The intensity of 1GeV beam on the AGS was used as the excitation source, and the light output and the decay time of the crystal were measured.The results show that the β PbF2: Gd crystal can generate faint scintillation light at room temperature with a light output of about 6 photoelectrons / MeV, and Most of the light output was measured within a time-gate width <30 ns and no slow component was found within 1 μs. The emission spectrum under X-ray excitation shows that 2 77 and 31 2 nm of the β PbF2: Gd crystal emit light The peaks correspond to the 6IJ → 8S7 / 2 and 6PJ → 8S7 / 2 energy transitions of Gd3 + ions, respectively.