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 / 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}

Properties of Atoms. Spectra.