Fully Differential Molecular-Frame Measurements for the Electron-Impact Dissociative Ionization ofH2

Abstract

We present fully differential state-resolved experimental data for the dissociative ionization of molecular hydrogen induced through electron impact. Molecular-frame ionization cross sections are derived for transitions from the X{1}Sigma{g}{+} molecular ground state to the 1ssigma{g}, 2psigma{u}, 2ssigma{g}, and 2ppi{u} states of H2+. For transitions to the 2ssigma{g} and 2ppi{u} states, a strong orientation dependence in the cross sections is revealed, with "side-on" preferred to "end-on" collisions and a propensity for the fragment proton to emerge along the normal to the scattering plane.

Strong Molecular Alignment Dependence ofH2Electron Impact Ionization Dynamics

“…For the ionization of H 2 into its ionic excited states, ðe; 2eÞ experiments with alignment determination were reported recently by Takahashi et al to study the nonisotropic electronic structure of H 2 [13] as well as by Bellm et al [14] to explore the collision dynamics for 174 eV electron impact. Ionization into the ionic ground state by 200 eV electron impact has been investigated by Senftleben et al [15,16].…”

Mapping electron dynamics in molecular H2using high-order-harmonic-generation time profiles

“…Electronic motions inside atoms, molecules, and solids can be traced, probed, and even modified with attosecond resolution in real time [1][2][3][4][5]; these motions are categorized as ultrafast dynamic processes [6][7][8][9][10][11][12][13][14]. Molecules as sources of high-order-harmonic generation (HHG) have gained increasing attention in recent years [15][16][17][18].…”

“…Space of the electron density of the two-electron 1D H 2 system around the nuclei is partitioned into four physicochemically significant partitions, including homolytic (e 1 …”

Division Xii / Commission 14 / Working Group Collision Processes

“…Dissociative processes: H 2 (Celiberto et al 2009, Bellm et al 2010, Celiberto et al 2011, HCl (Fedor et al 2010), HCl, DCl, HBr, DBr (Fedor et al 2008), C 2 H 2 (Chourou & Orel 2008). (Halmová et al 2008).…”