M S Pindzola et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 L127 doi:10.1088/0953-4075/39/6/L04
M S Pindzola1, F Robicheaux1 and J Colgan2
Show affiliationsElectron-impact double ionization cross sections for H− are calculated using a non-perturbative time-dependent close-coupling theory. The total wavefunction for the three-electron system is represented by a coupled channels expansion involving simple products of three-dimensional radial lattices and six-dimensional coupled spherical harmonics. Following time evolution of the total wavefunction according to the Schrödinger equation, collision probabilities are found by projection of the total wavefunction onto fully antisymmetric products of spatial and spin functions representing three outgoing Coulomb waves. The completely ab initio double ionization cross section results for H− are found to be more than a factor of 5 below the experimental measurements of Peart et al (1971 J. Phys. B: At. Mol. Phys. 4 88) and in excellent agreement with the experimental measurements of Yu et al (1992 J. Phys. B: At. Mol. Opt. Phys. 25 4593).
34.80.Dp Atomic excitation and ionization
31.15.-p Calculations and mathematical techniques in atomic and molecular physics
Issue 6 (28 March 2006)
Received 30 January 2006, in final form 10 February 2006
Published 27 February 2006
M S Pindzola et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 L127
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