Elastic scattering, angular distribution

Left Elastic scattering angular distribution for illustrating Fraunhofer scattering (Hiebert... 

The parameter rjc was determined by the least-square fitting to the experimental data [188-191]. Total elastic scattering cross section in the energy range of 10 eV to 10 MeV is shown in Fig. 8. Angular distributions for elastic scattering below 1 keV were obtained by direct sampling of various experimental data [189,190,192]. 

Figure 10.15 Angular distribution of 800 MeV protons that have been elastically scattered from 208Pb. [From Blanpied et al. (1978).]...

Figure 10.24 Angular distribution for 12C +160 elastic scattering, showing Fraunhofer diffraction and the elastic scattering of 160 with 208Pb, which shows Fresnel diffraction. [From Valentin (1981).]...

Fig. 3.9. Angular distributions of positrons elastically scattered by helium. The model H5 phase shifts were used to obtain these results.

We see on Fig. 7a that only NO desorbs from the support. Moreover the rise time of the NO desorbing pulse is equal to the rise time of the impinging pulse (20 ms). Thus, we can answer some of the previous questions NO does not dissociate nor react with the MgO and the interaction time is smaller than 20 ms (at RT). Therefore we can expect that NO is either reflected from the substrate or physisorbed. To distinguish between these two possibilities we proceed to a second experiment. The continuous NO beam is directed toward the sample in a given direction and we measure the angular distribution of scattered NO (in the incidence plane). We see on Fig. 7b that the angular distribution is peaked in the specular direction with a large lobe that means that at least part of the NO is quasi-elastically reflected... 

Fig. 9.6. Angular distribution of S, T and U and the derived moduli and relative phases of the scattering parameters for elastic scattering from Xe at 60 eV. Experiment o, Berger and Kessler (1986) Mollenkamp et al. (1984) and Wiibker, Mollenkamp and Kessler (1982). Absolute measured differential cross sections used in the derivation of the moduli / and g , Register et al. (1986) g, Williams and Crowe (1975). Theory —, McEachran and Stauffer (1986) ., Haberland et al. (1986) -----, Awe et al. (1983).

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