dorsal/arxiv
View SchemaLow-energy quenching of positronium by helium
| Authors | Sadhan K. Adhikari, P. K. Biswas, R. A. Sultanov |
|---|---|
| Categories | |
| ArXiv ID | physics/9911053 |
| URL | https://arxiv.org/abs/physics/9911053 |
| DOI | 10.1103/PhysRevA.59.4829 |
| Journal | Phys.Rev. A59 (1999) 4829-4832 |
Abstract
Very low-energy scattering of orthopositronium by helium has been investigated for simultaneous study of elastic cross section and pick-off quenching rate using a model exchange potential. The present calculational scheme, while agrees with the measured cross section of Skalsey et al, reproduces successfully the parameter $^ 1Z_{\makebox{eff}}$, the effective number of electrons per atom in a singlet state relative to the positron. Together with the fact that this model potential also leads to an agreement with measured medium energy cross sections of this system, this study seems to resolve the long-standing discrepancy at low energies among different theoretical calculations and experimental measurements.
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"abstract": "Very low-energy scattering of orthopositronium by helium has been\ninvestigated for simultaneous study of elastic cross section and pick-off\nquenching rate using a model exchange potential. The present calculational\nscheme, while agrees with the measured cross section of Skalsey et al,\nreproduces successfully the parameter $^ 1Z_{\\makebox{eff}}$, the effective\nnumber of electrons per atom in a singlet state relative to the positron.\nTogether with the fact that this model potential also leads to an agreement\nwith measured medium energy cross sections of this system, this study seems to\nresolve the long-standing discrepancy at low energies among different\ntheoretical calculations and experimental measurements.",
"arxiv_id": "physics/9911053",
"authors": [
"Sadhan K. Adhikari",
"P. K. Biswas",
"R. A. Sultanov"
],
"categories": [
"physics.atm-clus",
"cond-mat",
"nucl-th",
"physics.atom-ph",
"physics.chem-ph"
],
"doi": "10.1103/PhysRevA.59.4829",
"journal_ref": "Phys.Rev. A59 (1999) 4829-4832",
"title": "Low-energy quenching of positronium by helium",
"url": "https://arxiv.org/abs/physics/9911053"
},
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