Shape and Width of the Peak

Consequences of the Transient Nature of the Signal 17.3.3.1 Shape and Width of the Peak 

Under traditional conditions, the peak width for LC can easily achieve 60 s, whereas it is generally only about 5 s for GC [27]. These short transient signals with GC jeopardize the precision required for most environmental applications. Hence GC-MC-ICP-MS has to be specifically optimized in order to increase the peak width [13]. 

---

In the intrinsic part of the photoemission spectrum, that is, the elastic lines, there are basically three observables associated with each core-level or valence band peak line positions, line intensities, and line widths or line shapes. From these, different pieces of information can be gained. In core-level emission, the rough line positions reveal the elemental composition of the sample surface, whereas the exact positions are characteristic of the specific chemical environment of the atoms [6j. The intensities are determined not only by the atomic concentrations but also by the photoelectric cross sections and instrumental effects such as the photon flux and the transmission of the spectrometer. Finally, information on the many-body dynamics of the solid after the sudden creation of a photohole (the missing electron that has been ejected) is contained in the shape and width of the peak. In the simplest case, the line shape is Lorentzian and its width is a measure of... 

---