%0 Journal Article %1 WOS:A1996VA47600012 %A daSilva, EP %A Germano, JSE %A Lima, MAP %C ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA %D 1996 %I AMERICAN PHYSICAL SOC %J PHYSICAL REVIEW LETTERS %K imported %N 6 %P 1028-1031 %R 10.1103/PhysRevLett.77.1028 %T Annihilation dynamics of positrons in molecular environments: Theoretical study of low-energy positron-C2H4 scattering %V 77 %X We present a theoretical study of low-energy positron-C2H4 scattering using the Schwinger multichannel method. We calculated integral cross sections and the annihilation parameter Z(eff) for positron impact energies from 0.001 to 6 eV. We have used up to 23 112 configurations in a fully a initio calculation. Our results are in excellent agreement with available experimental data. As seen experimentally, at low energies, our calculated Z(eff) and cross sections are very large. We attribute this behavior to virtual positronium formation.

@article{WOS:A1996VA47600012, abstract = {We present a theoretical study of low-energy positron-C2H4 scattering using the Schwinger multichannel method. We calculated integral cross sections and the annihilation parameter Z(eff) for positron impact energies from 0.001 to 6 eV. We have used up to 23 112 configurations in a fully a initio calculation. Our results are in excellent agreement with available experimental data. As seen experimentally, at low energies, our calculated Z(eff) and cross sections are very large. We attribute this behavior to virtual positronium formation.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}, author = {daSilva, EP and Germano, JSE and Lima, MAP}, biburl = {https://www.bibsonomy.org/bibtex/2d41aac515c6f5143d7f46b14a03fc355/ppgfis_ufc_br}, doi = {10.1103/PhysRevLett.77.1028}, interhash = {806e25e8c3e738db6b15a8aebf1d0741}, intrahash = {d41aac515c6f5143d7f46b14a03fc355}, issn = {0031-9007}, journal = {PHYSICAL REVIEW LETTERS}, keywords = {imported}, number = 6, pages = {1028-1031}, publisher = {AMERICAN PHYSICAL SOC}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Annihilation dynamics of positrons in molecular environments: Theoretical study of low-energy positron-C2H4 scattering}, tppubtype = {article}, volume = 77, year = 1996 }