%0 Journal Article %1 WOS:000089294200004 %A de Carvalho, CRC %A Varella, MTD %A Lima, MAP %A da Silva, EP %A Germano, JSE %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2000 %I ELSEVIER SCIENCE BV %J NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS %K annihilation; positron-molecule scattering} {positron; %N 1-2 %P 33-46 %R 10.1016/S0168-583X(00)00036-7 %T Progress with the Schwinger multichannel method in positron-molecule scattering %V 171 %X We report calculations for low-energy positron-C2H2 and -N-2 scattering obtained through the Schwinger multichannel method (SMC). Integral and differential cross-sections and the annihilation parameter, Z(eff), are presented. For nitrogen, evidence of a Ramsauer-Townsend minimum and the possibility of overcorrelation in the scattering configuration space are discussed. Annihilation probability densities (APD) calculated for He and H-2 Seem to bring indirect support to a model previously proposed to explain why acetylene, unlike nitrogen, presents very high low-energy annihilation rates. (C) 2000 Elsevier Science B.V. All rights reserved.

@article{WOS:000089294200004, abstract = {We report calculations for low-energy positron-C2H2 and -N-2 scattering obtained through the Schwinger multichannel method (SMC). Integral and differential cross-sections and the annihilation parameter, Z(eff), are presented. For nitrogen, evidence of a Ramsauer-Townsend minimum and the possibility of overcorrelation in the scattering configuration space are discussed. Annihilation probability densities (APD) calculated for He and H-2 Seem to bring indirect support to a model previously proposed to explain why acetylene, unlike nitrogen, presents very high low-energy annihilation rates. (C) 2000 Elsevier Science B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {de Carvalho, CRC and Varella, MTD and Lima, MAP and da Silva, EP and Germano, JSE}, biburl = {https://www.bibsonomy.org/bibtex/2dc9bd06adf7515a88eb3303861543772/ppgfis_ufc_br}, doi = {10.1016/S0168-583X(00)00036-7}, interhash = {ce5e27634add6fca6432e9c6e26268d8}, intrahash = {dc9bd06adf7515a88eb3303861543772}, issn = {0168-583X}, journal = {NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS}, keywords = {annihilation; positron-molecule scattering} {positron;}, note = {10th Workshop on Low-Energy Positron and Positronium Physics (Positron Workshop 99), HIGH ENERGY ACCELERATOR RES ORG, TSUKUBA, JAPAN, JUL 28-31, 1999}, number = {1-2}, pages = {33-46}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Progress with the Schwinger multichannel method in positron-molecule scattering}, tppubtype = {article}, volume = 171, year = 2000 }