Electron-impact study of the NH radical using the R-matrix method

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.062710· OSTI ID:21528891

Rajvanshi, Jasmeet Singh; Baluja, K L ^[1]

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

We have employed the R-matrix method to compute elastic (integrated and differential), momentum-transfer, excitation, and ionization cross sections for electron impact on the NH radical. The target states are represented by including correlations via a configuration interaction technique. The results of the static exchange, correlated one-state configuration interaction, and 19-state close-coupling approximation are presented. We have detected a stable anionic bound state {sup 2{Pi}} of NH{sup -} having the configuration 1{sigma}{sup 2}2{sigma}{sup 2}3{sigma}{sup 2}1{pi}{sup 3}. The data of the momentum-transfer cross section, generated from the differential cross section, is used to compute effective collision frequencies over a wide electron temperature range (200-30 000 K). The ionization cross sections are calculated in the binary-encounter Bethe model in which Hartree-Fock molecular orbitals at self-consistent levels are used to calculate kinetic and binding energies of the occupied molecular orbitals. We have included up to the g partial wave (l=4) in the scattering calculations. For this dipolar molecule we have used a Born-closure top-up procedure to account for the higher partial waves for the convergence of the cross section.

• OSTI ID: 21528891
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
BINDING ENERGY
BOUND STATE
CALCULATION METHODS
COLLISIONS
CONFIGURATION INTERACTION
CONVERGENCE
CORRELATIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
HARTREE-FOCK METHOD
IONIZATION
LEPTONS
MATRICES
MOLECULES
MOMENTUM TRANSFER
PARTIAL WAVES
R MATRIX
RADICALS
SCATTERING