Angular distribution of photoelectrons from free molecules of N2 and CO as a function of photon energy

Valence and inner-valence shell dissociative photoionization of CO in the 26–33 eV range. II. Molecular-frame and recoil-frame photoelectron angular distributions

“…3 we compare our photoelectron asymmetry parameters, β e , computed in the length and velocity forms to earlier experimental data of Marr et al 71 and Holmes and Marr. 72 Note that we report asymmetry parameters, and by extension MFPADs, in the length and velocity forms and not in the mixed form since in the mixed form the differential cross sections do not have the correct functional form, so there is no unambiguous definition for the asymmetry parameters.…”

“…Comparison of computed photoelectron asymmetry parameters, β e , with earlier experimental data of Marr et al71 and Holmes et al72 The solid lines are the values computed in the length form and the dashed lines are in the velocity form.…”

Vibrationally resolved photoelectron angular distributions from randomly oriented and fixed-in-space N2and CO molecules

“…2) for photoelectron energies smaller than 60 eV. The results are compared with the available experimental data [4,13,27,54]. In the case of valence-shell photoionization, a direct comparison over a wide range of photon energies can only be carried out with vibrationally averaged β parameters.…”

“…Experimental data in the left and right panels correspond to non vibrationally resolved experimental data from Refs. [54] (circles) and [55] (squares), respectively.…”

Opacity

“…5.14 Photoelectron asymmetry parameter for the 2 u level of N 2 . Circles, K-matrix results of Stephens and Dill (1985); solid line, H-F results of Lucchese et al (1982); dashed curve, multi-scattering model results of Wallace et al (1979); triangles, experimental results of Marr et al (1979); plus signs, experimental results of Adam et al (1983) (Courtesy Southworth et al 1986 body-frame continuum functions for photo-ejected electrons include plane waves (Rabalais 1977), one-and two-center Coulomb functions (Iwata and Nagukura 1974;Hirota 1976), local-potential, muffin-tin X˛calculations , and static-exchange potentials involving correct treatment of the noncentral and nonlocal (static-exchange) molecular potential (Langhoff et al 1980). Planewave results are generally unsatisfactory for ionization of neutral molecules, whereas Coulomb wave functions can reproduce the correct high-energy limits of cross sections.…”