IIA Institutional Repository

Browsing by Author "Ray, H"

Browsing by Author "Ray, H"

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  • Comparative studies on ionizations in Ps-atom scattering using the Coulomb-Born approximation 
    Ray, H (Institute of Physics, 2002-08)
    Three different types of ionization in Ps-He scattering are studied using the Coulomb-Born approximation. Two different approaches are used to orthogonalize the continuum Coulomb wavefunctions. The non-unitarity problem ...
  • E2-transition probabilities for NiXVIII 
    Ray, H (Kluwer Academic Publishers, 2003-02)
    Accurate theoretical data for the transition probabilities are highly demanding in astrophysics and in the study of plasma in astrophysical objects and fusion devices. Na-like highly stripped ions of iron group, specially ...
  • Ionization in Ps-H scattering 
    Ray, H (Elsevier, 2002-06)
    Coulomb–Born approximation has been used to study three different types of ionization in positronium (Ps) and hydrogen scattering. The present Ps–H system contains four centers; we have considered all the Coulomb interactions ...
  • Ionizations in Ps-atom scattering 
    Ray, H (Elsevier, 2002-05)
    Ionizations in Ps-atom scattering are studied using three different types of target: H, He and Li. Three different types of ionization cross-sections are compared, considering a large number of excitation channels of both ...
  • The scattering of positronium by lithium 
    Ray, H (Institute of Physics, 2000-10)
    The scattering of positronium (Ps) by lithium (Li) is investigated using the static-exchange approximation and a two-state close-coupling approximation (CCA) including exchange. The major effect of very high polarizability ...
  • Studies on E2 Transition in the Na-like Highly Stripped Ion Fe XVI 
    Ray, H (The American Astronomical Society, 2002-11)
    The spectrum of the solar corona and plasma spectra in astrophysical objects and fusion devices exhibit forbidden lines in alkali-like ions. Ions belonging to the iron group are particularly important in this respect. The ...
  • Studies on the E2-transition in CoXVII 
    Ray, H (EDP Sciences, 2002-09)
    The spectrum of the solar corona, plasma spectra, astrophysical objects and fusion devices exhibit forbidden lines in alkali-like ions. Ions belonging to the iron group are particularly important in this respect. More ...
  • Term values of Na-like iron group highly stripped ions using coupled-cluster theory 
    Ray, H (Institute of Physics, 2002-07)
    More accurate term values, a few line strengths and transition probabilities for the E2 transitions of the iron group highly stripped ions Fe XVI, Co XVII and Ni XVIII are reported. We have used the fully relativistic ...

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