单项选择题

在X射线光谱法中，若需要测定S_i K_α0.712 6 nm时，应选用下列晶体______分光。
A．右旋酒石酸乙二胺(2d=0.880 8 nm)；B．氯化钠(2d=0.564 1 nm)；
C．氟化锂(2d=0.402 8．nm)； D．黄玉(2d=0.271 2 nm)。

A.712
B.右旋酒石酸乙二胺(2d=0.880
C.氯化钠(2d=0.564
D.氟化锂(2d=0.402
E.nm)；
F.黄玉(2d=0.271

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单项选择题

在X射线光谱法中，若需要测定Si Kα0.712 6 nm时，应选用下列晶体______分光。 A．右旋酒石酸乙二胺(2d=0.880 8 nm)；B．氯化钠(2d=0.564 1 nm)； C．氟化锂(2d=0.402 8．nm)； D．黄玉(2d=0.271 2 nm)。