Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Mary T. McAlinden"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 247:111-116
Cross sections differential with respect to energy and angle of ejected positrons and electrons for Ps(1s) fragmentation in collision with He, Ne, Ar, Kr and Xe targets are reported. For Ne, Ar, Kr and Xe, only the case where the target is not excite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f92ae9a9a4b76b956b11b0d90e463702
https://doi.org/10.1016/j.nimb.2006.01.046
https://doi.org/10.1016/j.nimb.2006.01.046
Publikováno v:
Physical Review A. 60:4454-4460
Coupled-state calculations are presented for $\mathrm{Ps}(1s)+\mathrm{He}{(1}^{1}S)$ scattering in the energy range 0--40 eV. Up to 22 Ps states are employed but only one He state is retained. Pseudostates are used to represent the Ps continuum. Firs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d8494ffd97bd906189f60c2e959a9fb
https://doi.org/10.1103/physreva.60.4454
https://doi.org/10.1103/physreva.60.4454
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 143:41-56
The current status of coupled-state results for positron scattering by atomic hydrogen and the alkali metals is briefly reviewed. The extension of the coupled-state approximation to “two-electron” targets, i.e., He and the alkaline earths, is out
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1124e210477777db40dbbac22b17b620
https://doi.org/10.1016/s0168-583x(98)00219-5
https://doi.org/10.1016/s0168-583x(98)00219-5
Publikováno v:
Physical Review Letters. 80:5097-5100
Extensive new calculations, in the coupled-pseudostate formalism, are reported for o-Ps $(1s)$ scattering by H $(1s)$ in the energy range 0 to 40 eV. An $S$-wave resonance first predicted by Drachman and Houston [Phys. Rev. A 12, 885 (1975)] is confi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bd73c11e9c06b4e5a00e643adc049a9
https://doi.org/10.1103/physrevlett.80.5097
https://doi.org/10.1103/physrevlett.80.5097
Publikováno v:
Pramana. 50:573-589
We describe the present status of coupled-state calculations for positron scattering by ‘one-electron’ atoms. We show how pseudostates are used to represent the continuum channels. Illustrative results from positron scattering by atomic hydrogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f2c26fb1c3139010b11f81cb6a0407e
https://doi.org/10.1007/bf02846048
https://doi.org/10.1007/bf02846048
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 30:1543-1561
Positron scattering by lithium in the energy range 0.5 - 60 eV is studied within a frozen-core model of the atomic target using six different levels of approximation: (i) ; (ii) ; (iii) ; (iv) ; (v) ; (vi) ; where a bar denotes a pseudostate. The res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cda9ed18f1fa1a91b18f73c237b9510
https://doi.org/10.1088/0953-4075/30/6/021
https://doi.org/10.1088/0953-4075/30/6/021
Publikováno v:
Canadian Journal of Physics. 74:434-444
Calculations of total cross sections for Ps(1 s) scattering by atomic hydrogen, helium, and argon are reported for the energy range 0–150 eV. The results for atomic hydrogen have been evaluated exactly within the first Born approximation. For colli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c37fc455de445ee4e4d6840d14208fef
https://doi.org/10.1139/p96-062
https://doi.org/10.1139/p96-062
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 29:2089-2102
Cross sections for positron scattering by atomic hydrogen are calculated in the energy range 0 - 110 eV using a 33-state approximation which employs the 1s, 2s and 2p eigenstates of both positronium and hydrogen together with 27 hydrogen pseudostates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eec3d082b16fc00dc0090200ed3d0341
https://doi.org/10.1088/0953-4075/29/10/017
https://doi.org/10.1088/0953-4075/29/10/017
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 29:555-569
Coupled-state calculations in a K(4s,4p,5s,5p,3d) + Ps(1s,2s,2p,3s,3p,3d) approximation are reported for positron scattering by ground-state potassium in the energy range 0.5 - 60.0 eV. Comparison is made with the earlier work of Hewitt and co-worker
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50a076a81472d1642269b1ff0eb2e235
https://doi.org/10.1088/0953-4075/29/3/020
https://doi.org/10.1088/0953-4075/29/3/020
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 28:1079-1094
We report results for positron scattering by ground-state atomic hydrogen in the energy range 0 to 80 eV. The calculations have been performed in an 18-state Ps(1s, 2s, 3s, 4s, 2p, 3p, 4p, 3d, 4d)+H(1s, 2s, 3s, 4s, 2p, 3p, 4p, 3d, 4d) approximation w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39519abbdead7a2c727afd2bd288c4b9
https://doi.org/10.1088/0953-4075/28/6/021
https://doi.org/10.1088/0953-4075/28/6/021