Question 4.12 The so-called K ( alpha ) doublet of characteristic X-ray radiation is often used for the precise measurements of a lattice parameter. The effect of this ( mathrm{K} alpha ) doublet on the diffraction angle becomes more prominent in a peak detected in the high angle region. Explain the reason and its separation ( left(mathrm{K} alpha_{1} ight. ) and ( mathrm{K} alpha_{2} ) ).

Question 4.12 The so-called K doublet of characteristic X-ray radiation is often used for the precise measurements of a lattice parameter. The effect of this K doublet on the diffraction angle becomes more prominent in a peak detected in the high angle region. Explain the reason and its separation (K1 and K2 )