Generalized relaxation cross sections

Bonamy L., Bonamy J., Robert D., Temkin S. I. Consequences of angular momenta coupling on generalized spectroscopic relaxation cross-sections collisional narrowing in isotropic and anisotropic Raman CO2 branches, Proc. 13th ICORS. (Wiley Sons, New York) (1992). 

It should be emphasized that the data shown in Fig. 3 do not provide information on the fate of the excited or ionized molecule these data constitute a sum over final molecular states. Generally, measurements of excitation and ionization cross sections for fast electrons do not provide information on subsequent target relaxation modes. However, this information is often available from separate measurements that focus on state-selected partial cross sections and molecular fragmentation [19]. 

The large cross-sections for spin-orbit relaxation of Na and K in the 2P states, however, seem to show that angular momentum change is not generally restrictive. The observations of Stepp and Anderson perhaps have their origin in the pe-... 

Figure 14 Illustration of the general procedure used to locate the initial relaxation direction (IRD) toward the possible decay products, (a) General photochemical relaxation path leading (via conical intersection decay) to three different final structures, (b) Potential energy surface for a model elliptic conical intersection plotted in the branching plane, (c) Corresponding energy profile (as a function of the angle a) along a circular cross section centered on the conical intersection point and with radius d.

To conclude, our general analysis, from first principles, indicates the remarkable possibility of scattering cross-section modification caused by environmental relaxation of the target states, Eq. (7), without appreciable extra broadening of the scattering line shape. This relaxation is an irreversible process and related to, or accompanied with, fast decoherence of the initial entanglement of the struck proton with its adjacent particles (electrons, and per-... 

Satisfactory correlations have been equally obtained between and the strength of van der Waals forces expressed by such parameters of the collider as its dipole moment, polarizibility and ionization potential/ Rotational relaxation (at least for nonresonant interactions) does not show any general propensity rules.Differential cross-sections for J- J rotational relaxation show only a slight dependence on A/ and AIF, as long as A does not exceed kT. The efficient transition into a large number of rotational levels in a single collision has been observed in many molecules such as OH, NO, glyoxal, and benzene. ... 

---