The yield of electrons with 4-eV kinetic energy from vacuum-cleaved InP(110) in the photon-excitation range 65 to 195 eV is reported. The broad peak near 88 eV is assigned to a delayed onset of the In(4d→4f) transition. Spectral features in the range 129-180 eV are caused by excitation of the P(LII,III) electrons. The binding energy of the P(LII) and P(LIII) electrons is determined to be 134.0 ±{} 0.2 and 133.0 ±{} 0.2 eV, respectively, below the vacuum level. Weak features associated with In In(NI) and P(LI) excitations are also reported.
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Rosenberg et al. (1983) studied this question.
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