Boron Auger spectrum

The boron Auger electron spectrum of BjOj shows peaks that can be assigned as KL L and AX2,3 2,3, with energies and widths consistent with those seen in the x-ray photoelectron spectrum, but it also shows several additional features associated with solid-state processes. The resolution of the Auger spectrum is insufficient to resolve contributions from individual molecular orbitals. 

FIGURE 5 Auger spectrum from intergranular fracture surfaces of undoped (a), (b), and (c) and boron-doped (d), (e), and (f) NisAI. (a) and (d) are spectra from as-fractured surfaces. All other samples were exposed to the indicated pressure of water vapor. [From Lee, K. H., Lukowski, J. T., and White, C. L., (1996). Scripta Metall. 35,1153.]... 

Conventionally, Auger spectra are presented in the differentiated energy distribution form dN(F)/dF, rather than in the undifferentiated form N(E) used in XPS. Differentiating enhances the visibility of Auger features, as is demonstrated in Fig. 2.20, in which the differentiated spectrum from boron is shown above the corresponding N(E) spectrum. The N(E) distribution is nowadays recorded digitally, and differentiation is performed by computer. With the rapid improvement in the signal-to-noise... 

Note from Fig. 2.20 that although the true position of the boron KLL Auger peak in the N(E) spectrum is at 167 eV, the position in the dN(E)/dE spectrum is taken for purely conventional reasons to be that of the negative minimum, i.e. at 175 eV. 

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