Distribution angular measurement

Velocity and angular distribution measurements of the product ions from collision-induced dissociation have provided additional information concerning the mechanisms of these processes and the nature of the reactant and product states involved.380 62,208 213"218 The experimental results obtained at relatively high incident-ion energies are generally... 

Angular distribution measurements of the SHG were carried out on BADP/PAA composites, in a manner similar to that described for mNA/PMMA. Analogous behaviour was observed, and Figure 3 illustrates the distribution obtained from a well-aligned sample. In this case, the angular distribution of the SH is very narrow, and most of the SH flux is confined to a narrow cone in the forward direction. 

In order to elucidate the nature of the 0+ excitations in (>Zr an(j t0 search for associated structures, we have performed (n,n y) reaction studies. Gamma-ray singles and angular distribution measurements were first carried... 

Detail tests on nuclear models require not only a knowledge of energy, spin and parity of many levels, but also the determination of transition multipolarities and branching ratios. Precise intensities are thus needed. The well shielded anti-Compton spectrometer offers a rather simple solution especially for accurate angular distribution measurements. When the spectra are very complex, like in the case of final doubly odd nuclei, intensities cannot be determined without use of high resolution instruments. The curved crystal spectrometer provides a powerful solution at, unfortunately, non negligible cost. 

From this relation it can be seen that the determination of ft is possible, provided that the polarization parameter St does not vanish and that St and A are known. These parameters can be obtained from a calibration measurement, i.e., an angular distribution measurement for a target with a known and non-vanishing fi (see... 

Figure 1.18 Example of the determination of the Stokes parameter S, and tilt angle X measured at 40 eV photon energy. It is based on an angular distribution measurement of ls-photoelectrons in helium for which equ. (1.55a) holds with P = 2. The arrows point to the measured values (with error bars, some of which are too small to be visible) the solid curve is a fit of the experimental data to this equation from which = 0.819(3) and...

Leahy, D.J., Reid, K.L. and Zare, R.N. (1991). Determination of molecular symmetry axis (z) orientation via photoelectron angular distribution measurements, J. Phys. Chem., 95, 8154-8158. 

Figure 9 Angular distributions measured for scattering of NO with a translational energy of about 2.1 eV from clean (open diamonds) and H-covered (full circles) Ru(0001). The sharp distribution around the specular angle of 60° indicates the angular width of the primary beam. Note the remarkable decrease of the angular width in case of H-coverage. Hydrogen turns the surface into a molecular mirror. From Butler et al. [84],...

Angular distribution measurements of reactive scattering of alkaline earth atoms A by halogen molecules X2 have been reported80 for Ba + Cl2 and more extensively81-82 for Ba, Sr, Ca, Mg with Cl2, Br2, IC1, BrCN. The reactions form monohalide products AX, thus following primarily the reaction path... 

The second electron jump occurs with very high probability in the reactions of alkali dimers with polyhalide molecules (see Section II.B), resulting in the capture of both alkali atoms as bound alkali halides MX. Thus, it would be very interesting to see whether the dihalides AX2 become prominent reaction products in the alkaline earth atom reactions with polyhalide molecules. Unfortunately, angular distribution measurements are presently equivocal on this point (see Section III.A). 

The study of the photoelectrons produced in the (1 + 1 ) REMPI spectrum of NO via several rotational levels of the A2S+ state has been called a complete experiment because the CDAD and the angular distribution measurements were used to extract twelve parameters, corresponding to the magnitudes and phase shifts of the transition moments to all of the important IX partial waves. The measured parameters were compared to corresponding theoretical values (Reid and Leahy, 1995, and Allendorf, et al., 1989). 

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