Quasiparticle approximation to the dilated electron propagator with application to 2P shape resonances in e-Be and e-Ca scattering

Medikeri, Milan N. ; Mishra, Manoj K. (1993) Quasiparticle approximation to the dilated electron propagator with application to 2P shape resonances in e-Be and e-Ca scattering Chemical Physics Letters, 211 (6). pp. 607-612. ISSN 0009-2614

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/000926...

Related URL: http://dx.doi.org/10.1016/0009-2614(93)80151-E

Abstract

The quasiparticle approximation to the second-order and diagonal 2ph-TDA decoupling of the dilated bi-orthogonal electron propagator has been employed for the first time to compute the energies and widths of the 2P shape resonances in e-Be and e-Ca scattering. The results demonstrate that the quasiparticle approximation offers an effective and economic alternative for the treatment of resonances described by a single root of the dilated electron propagator.

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ID Code:20288
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