Angle-energy distributions of Penning ions in crossed molecular beams. II. Effect of Penning electron recoil in Ne*(3 s sup 3 P sub 2 )+H,D r arrow Ne+H sup + ,D sup + + e sup minus

Journal Article · Sun Sep 01 04:00:00 EDT 1991 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.460842· OSTI ID:5311794

Khan, A; Siddiqui, H R; Siska, P E ^[1]

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1. Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania (USA)

Relative doubly differential cross sections for Penning ionization in the title systems are reported at a mean collision energy of 10.4 kcal/mol in a crossed supersonic beams experiment. As in paper I of this series on He*(2{sup 1}{ital S})+H,D, the H{sup +},D{sup +} products are scattered sharply forward with respect to the incident H,D in the center-of-mass frame, but with the release of an additional 30 kcal/mol into translational energy at the peak of the distribution. Unlike the results of paper I, we find that a single optical potential, corresponding to an autoionizing state of NeH of assumed {sup 2}{Sigma}{sup +} symmetry, consistently represents the main features of both previously reported low-energy Penning ionization electron spectroscopy (PIES) data and the present results. Agreement between theory and experiment in the angular distributions is improved by including coupling between the angular momenta of the Penning electron and the atoms after ionization. The resonance width for PI is found to be nonexponential, showing a saturation'' effect at small distance. This is interpreted in terms of the ionic (charge transfer) character of the bonding in NeH*.

• OSTI ID: 5311794
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 95:5; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BEAMS
COLLIDING BEAMS
COLLISIONS
CROSS SECTIONS
DEUTERIUM
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MOLECULAR BEAMS
NEON
NEON COMPOUNDS
NEON HYDRIDES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OPTICAL MODELS
P STATES
PENNING EFFECT
RARE GAS COMPOUNDS
RARE GASES
RECOILS
STABLE ISOTOPES