Resonance energies threshold

Table 8.2. Threshold energy, cross section maximum, resonance energy, and FWHM for different photo-induced reactions...

Figure J5 7=0 state resonance energies of the dd t molecular ion for different screening parameters along with the n = 0 threshold energies of dp. Reprinted with permission from [224] 2008, EDP Sciences...

Resonance and threshold structures in fixed-nuclei electron-scattering cross sections are replicated, with characteristic energy shifts, in rovibrational excitation... 

Hotop H, Ruf MW, Allan M, Fabrikant II (2003). Resonance and threshold phenomena in low-energy electron collisions with molecules and clusters. At Mol Opt Phys 49 85. 

Table 8.6. Resonance energies Eo(eV) and widths r lO eV) for the electron—hydrogen 2s and 2p channels below the n=3 threshold. The experimental data are due to Williams (1988). Errors in the last significant figures are shown in parentheses. Column headings for calculations are PS, pseudostate calculation by Callaway (1982) R-matrix, Pathak, Kingston and Berrington (1980) CCO, McCarthy and Shang (1992)...

Photoemission spectra measured at the resonance energy for the Ti 3p core threshold hv=47 eV (fig. 12) showed that the (1x1) surface supported no bandgap states, whereas for the (1x3) surface there was pronounced emission intensity in the gap [241]. The gap state also showed resonance enhancement at the Ti 2p core threshold [242]. Similar bandgap intensity is produced by K-deposition [243,244], A simple model for the (1x3) reconstruction was put forward, involving removal of every third row of on-top oxygen ions from an essentially bulk terminated (100) surface. The intensity of the bandgap emission was consistent with this model. However, grazing incidence X-ray diffraction [245] led to development of a radically different model for the (1x3) surface... 

Table II. Comparison of exact (CC) and approximate resonance energies E and widths T (in cm ) for n 0 levels of H2(l,2)-Ar taken from Ref. (19). The zero of energy is the H2(li2) excitation threshold, and AE =(e" -e ).

Table II. Comparison of SFCCCC with CCS resonance energies Ej (cm ) and widths T (cm ) for the Ar -H2 (v"l, j=2) resonances. The zero of Is defined as the j=2 rotational energy threshold.

Table II. Resonance and threshold energies for the collinear F+H FH+H reaction on the Muckermann V potential energy surface (50).

The fact that they tend to be fairly symmetrical (at least when they occur below the ionisation threshold) is related to their time characteristics from the lifetime widths and resonance energies, one can deduce that the giant resonances in metallic clusters are many-body oscillations undergoing several periods. Giant resonances in metallic clusters can truly be considered as plasmons, and relate quite clearly to surface plasmons in solids. 

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