Continuum-distorted-wave eikonal-initial-state description of the electron-impact ionization of H2O and aligned H2 molecules

E. ACEBAL; S. OTRANTO

Normal, Illinois

Simposio; (virtual) International Symposium on Correlation, Polarization and Ionization in Atomic and Molecular Collisions; 2021

In the last few years, reactionmicroscopes have allowed for an unprecedented level of detailregarding the exploration of electron-impact ionization of atoms andmolecules at the fully differential level. In this context, moleculartargets, as simple as H2,still provide a challenging testing ground for the state-of-the-arttheoretical models, either based on numerically intensive orperturbative treatments. In this talk, we present the fullydifferential cross sections (FDCS) obtained by implementing thecontinuum-distorted-wave (CDW) eikonal-initial-state (EIS) model, ofample use in the ion-atom context. Two molecular target systems areexplicitly considered: non-oriented H2Oand aligned H2.For the former, the final channel is described by using a singlecenter description of the H2O+ion. For the latter, the multicenter nature of the molecular ion isexplicitly taken into account. In both cases results obtained arecontrasted against recent experimental data and reported theoreticalcalculations using the time-dependent close-coupling method and thedistorted wave Born approximaton. Present results suggest that, as inthe ion-impact case, the CDW-EIS model is capable of providing a gooddescription of the experimental FDCS and allows inferring valuableinformation on the physical mechanisms ruling the collision process.p { margin-bottom: 0.25cm; direction: ltr; color: #000000; line-height: 115%; orphans: 2; widows: 2 }p.western { font-family: "Liberation Serif", "Times New Roman", serif; font-size: 12pt; so-language: es-AR }p.cjk { font-family: "Noto Sans CJK SC"; font-size: 12pt; so-language: zh-CN }p.ctl { font-family: "Lohit Devanagari"; font-size: 12pt; so-language: hi-IN }