Energy spectra, backscattering analysis

Fig. 3.18 Pulse-height analysis (PHA) spectrum (or energy spectrum) for Co/Rh Mossbauer source radiation backscattered nonresonantly and/or resonantly from aluminum and stainless steel plates. Data were obtained with Si-PIN diodes with sensitive area of 1 cm per diode and a thickness of 400 pm (from [36, 46])...

Various methods of analyzing surfaces for chanical composition and physical texture. Electron spectroscopy for chemical analysis and Auger analysis [19] are techniqnes that have been used to identily chemical species in thin films. In Rutherford backscattering spectrometry incident He ions are scattered elastically by nuclei. The energy spectrum thus obtained can... 

We illustrate the analysis of the formation of Ni-silicide in Fig. 5, which plots backscattering yield versus the kinetic energy of the backscattered particles whose incident energy was 2.0 MeV. The solid line is the spectrum from a 200 nm layer of Ni deposited on Si. The thickness is indicated by the width of the energy signal. 

Energy-dispersive X-ray (EDX) spectroscopy utilizes the characteristic spectrum of X-rays that is emitted by a sample, following initial excitation by the high-energy electron beam. Information about the elemental composition of the sample can be obtained, where the spatial resolution is determined by the probe size, any beam broadening occurring within the specimen, and the effects of any backscattered electrons on the specimen around the point of analysis. EDX is relatively simple and can be used to provide rapid qualitative microanalysis. Quantitative elemental analysis can also be achieved, with an... 

Nuclear reactions resulting in particle emission Some nuclear reactions result in the emission of a particle (proton or alpha) with an energy higher than the primary beam energy so that they can be detected unambiguously in the detector used for RBS analysis. Relatively few reactions are useful for analytical purposes. One example is Li (p,a) He, which occurs when Li is bombarded with 2-3 MeV protons. Two alpha particles are emitted which have energies of 7-8 MeV and can be detected with no interference from the spectrum of backscattered protons. 

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