Shape resonant features in the photoionization spectra of NO

Abstract

Articles you may be interested inMultipletspecific shape resonant features in vibrationally resolved 3σ g photoionization of O2 J. Chem. Phys. 91, 150 (1989); 10.1063/1.457493 Multipletspecific shape resonant features in 3σ g photoionization of O2Calculations of core and valence level photo ionization spectra of NO are presented and compared with available experimental data. A low-lying continuum shape resonance is identified in the (J' photoionization channel, which is the analog of similar states found in other first-row diatomic molecules. Both partial cross sections and photoelectron angular distributions are discussed, and the effect of nuclear motion on these observables is treated.

Multiplet-specific shape resonant features in photoionization of NO

“…3 we also show the fixed-nuclei cross sections obtained with the continuum multiple-scattering model. 20 This model gives a resonance width which is narrower than is seen in our static-exchange results but the resonance positions are about the same. Vibrational averaging leads to significant, 20 but probably excessive, 13 broadening of these fixed-nuclei multiple-scattering cross sections.…”

“…20 This model gives a resonance width which is narrower than is seen in our static-exchange results but the resonance positions are about the same. Vibrational averaging leads to significant, 20 but probably excessive, 13 broadening of these fixed-nuclei multiple-scattering cross sections. The 19 Although preliminary unnormalized results have been published for these cross sections, it seems advisable not to reproduce these results in our figures at this time.…”

“…Identical potentials have often been used for these different multiplet channels. This approximation, which has been made in previous studies of 5u photoionization of N0, 20 • 21 leads to cross sections that are exactly in the multiplet ratio as a function of kinetic energy, e.g., 3: 1 in this case. Although multiplet-averaged potentials can be useful in nonresonant channels, important features such as the peak positions in shape-resonant cross sections may be poorly reproduced by such potentials.…”

“…19 Figure 4 shows our calculated photoelectron asymmetry parameters for the b 3 ll state along with those of the multiple-scattering model 20 and the measured values of Southworth et a/. 17 The structure in these parameters between 17 and 22 e V is due to autoionization which is not included in our model.…”

Vector Correlations in Dissociative Photoionization of Diatomic Molecules in the VUV Range: Strong Anisotropies in Electron Emission from Spatially Oriented NO Molecules

“…We adopt here the assignment of the c 3 P͑n 0͒ at 21.7 eV and B 1 P͑n 0͒ at 22.7 eV [18]. These states correspond to photoionization of the ͑4s͒ shell of the NO ͑X 2 P͒ molecule which gives rise to a broad shape resonance centered around 29 eV [19][20][21][22][23]. When the photon energy is varied, the excess energy is carried out by the electron, reflecting ionization into the c 3 P and B 1 P states in the FC region, prior to dissociation.…”