Neutron impact ionization of helium
نویسندگان
چکیده
منابع مشابه
Neutron-impact ionization of He
The double ionization of He by either photon impact or bare ion impact are simple examples of the quantal three-body Coulomb breakup problem. For example, the double photoionization of He near threshold produces two slow moving continuum electrons in the Coulomb field of an alpha particle, which is extremely difficult for perturbation theory to handle. On the other hand, various non-perturbativ...
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The threshold law for the cross section for ionization of simple monatomic gases by electron impact has recently been the subject of renewed interest 2. To date, studies of He+, using the retarding potential difference (RPD) technique 3 6 have been taken as support for, or interpreted with the aid of, a linear threshold law 7 , 8 . Recent studies with a 127° electrostatic energy selector have, ...
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The close-coupling approach to electron-helium single ionization is analyzed and several ways of defining the scattering amplitudes are determined, for both equaland unequal-energy outgoing electrons. Nevertheless, the various definitions all lead to the same cross section. The convergent close-coupling sCCCd method with Laguerre sCCC-Ld and box-based sCCC-Bd target functions is applied to calc...
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Singleand double-ionization processes in electron scattering from a model helium atom are calculated by a direct solution of the time-dependent Schrödinger equation on a 3D lattice. The Coulomb interaction between the electrons is described by v(r1 ,r2)51/r. and all angular momenta are set to zero. The initial state is a product of the ground state of the model helium atom on a 2D lattice with ...
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Electron-impact double-ionization cross sections for the helium atom are calculated by direct solution of a nine-dimensional Schrödinger equation using a time-dependent close-coupling method. Previous calculations are extended to higher incident electron energies using a simple factor-of-2 reduction in the mesh spacing for the three-dimensional radial lattice. The recent calculations, computati...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2012
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/388/7/072016