Abstract
We have studied the surface resonances on Mo(100) and W(100) with angle-resolved, $\ensuremath{\hbar}\ensuremath{\omega}$-dependent photoemission using synchrotron radiation. For normal emission, two resonances are seen. They are located 0.3 and 3.3 (0.4 and 4.2) eV below ${E}_{\mathrm{F}}$ for Mo (W). The high-lying resonance remains symmetric and narrow for all photon energies used. Its intensity peaks at $\ensuremath{\hbar}\ensuremath{\omega}=15 \mathrm{and} 30 (14 \mathrm{and} 29)$ eV for Mo (W). For $\ensuremath{\theta}>~2\ifmmode^\circ\else\textdegree\fi{}$, a second highlying resonance appears a few tenths of an eV below the first one. Many-body phenomena are not required to explain the data.
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