QUASI-PARTICLE APPROXIMATION TO THE DILATED ELECTRON PROPAGATOR WITH APPLICATION TO P-2 SHAPE RESONANCES IN E-BE AND E-CA SCATTERING

Authors
MEDIKERI MN MISHRA MK
Citation
Mn. Medikeri et Mk. Mishra, QUASI-PARTICLE APPROXIMATION TO THE DILATED ELECTRON PROPAGATOR WITH APPLICATION TO P-2 SHAPE RESONANCES IN E-BE AND E-CA SCATTERING, Chemical physics letters, 211(6), 1993, pp. 607-612
Citations number
72
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
211
Issue
6
Year of publication
1993
Pages
607 - 612
Database
ISI
SICI code
0009-2614(1993)211:6<607:QATTDE>2.0.ZU;2-R
Abstract
The quasiparticle approximation to the second-order and diagonal 2ph-T DA decoupling of the dilated bi-orthogonal electron propagator has bee n employed for the first time to compute the energies and widths of th e 2P shape resonances in e-Be and e-Ca scattering. The results demonst rate that the quasiparticle approximation offers an effective and econ omic alternative for the treatment of resonances described by a single root of the dilated electron propagator.