不少作者已就外来离子对卤化银乳剂微晶缺陷结构、晶形调变、离子电导、表面电位、光学行为、感光性能等方面的影响进行了研究,并取得了许多有价值的结果.但对稀土离子掺杂的研究至今尚未见报道.最近,国内首次发表了碘溴化银乳剂中掺铈的研究报告,在稀土掺杂效应研究方面取得了一些颇有启发性的结果.本文就另一稀土元素——镧(La)离子加入到碘溴化银乳剂中,对乳剂感光性能的影响进行探讨. Many authors have studied the influence of extrinsic ions on the defect structure, crystal modification, ionic conductance, surface potential, optical behavior and photographic properties of silver halide emulsions and have achieved many valuable results. Recently, no report has been reported on the doping of rare earth ions.Recently, the first report on cerium iodide in silver iodide emulsion has been published in China, and some enlightening results have been obtained on the doping effects of rare earths.In this paper, The effect of rare earth element-lanthanum (La) ions on silver iodobromide emulsion was discussed.