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Properties of Atoms. Spectra.

Problem 6.142

Find the kinetic energy and the velocity of the photoelectrons liberated by \(K_{\alpha}\) radiation of zinc from the \(K\) shell of iron whose \(K\) band absorption edge wavelength is \(\lambda_{K}=174 \mathrm{pm}\)

Reveal Answer
T=3/4ℏR(Z−1)2−2πcℏ/λK=1.45keV,v=2.26⋅107 m/sT=3 / 4 \hbar R(Z-1)^{2}-2 \pi c \hbar / \lambda_{K}=1.45 \mathrm{keV}, \quad v=2.26 \cdot 10^{7} \mathrm{~m} / \mathrm{s}
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