Electron-impact study of AlH using the R-matrix method

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.042701· OSTI ID:21316406

Kaur, Savinder; Baluja, K L ^[1]

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1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)

We have carried out a comprehensive study of electron-impact on AlH molecule using the R-matrix method. Elastic (integrated and differential), momentum-transfer, excitation, and ionization cross sections along with rate coefficients have been presented at various levels of approximation. The target states are represented by including correlations via a configuration-interaction technique. The results of the static-exchange, one-state, and 20-state close-coupling approximations are presented. Our study has detected Feshbach and core-excited shape resonances in 20-state model. We detect a stable bound state of AlH{sup -} having configuration 1{sigma}{sup 2}2{sigma}{sup 2}3{sigma}{sup 2}4{sigma}{sup 2}1{pi}{sup 4}5{sigma}{sup 2}2{pi} with a vertical electronic affinity value of 0.22 eV which is in good agreement with the estimated experimental value of about 0.15 eV. The ionization cross sections are calculated in binary-encounter-Bethe model in which Hartree-Fock molecular orbitals are used to calculate kinetic and binding energies of the occupied molecular orbitals.

• OSTI ID: 21316406
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
AFFINITY
ALUMINIUM COMPOUNDS
BINDING ENERGY
BOUND STATE
CONFIGURATION INTERACTION
CROSS SECTIONS
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
EXCITATION
HARTREE-FOCK METHOD
IONIZATION
MOLECULES
MOMENTUM TRANSFER
R MATRIX
RESONANCE