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[求助] XRD 单晶 Omega-2θ 峰位角度准确性测试

如题,蓝宝石衬底上生长的不同Al组分的薄膜测试,模式omega-2θ,测试结果发现蓝宝石衬底的峰位有偏差:
1,如果蓝宝石峰位与资料上对比有0.05度的偏差,如何校准整个曲线?
2,如果不校准蓝宝石峰位,怎么准确测试出omega或者2θ,只要能得到一个准确的参数就可以了吧?

做过xrd 测试,但步骤可能不严谨,用的x'pert XRD,谢谢
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