ZEFF ACCORDING TO THE SCHWINGER MULTICHANNEL METHOD IN POSITRON SCATTERING

被引：57
|
作者：
DASILVA, EP
GERMANO, JSE
LIMA, MAP
机构：
[1] UNIV ESTAD CAMPINAS, INST FIS GLEB WATAGHIN, BR-13083 CAMPINAS, SP, BRAZIL
[2] UNIV FED CEARA, DEPT FIS, BR-60000 FORTALEZA, CEARA, BRAZIL
来源：
PHYSICAL REVIEW A | 1994年 / 49卷 / 03期
关键词：
D O I：
10.1103/PhysRevA.49.R1527
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We use the wave function from the Schwinger multichannel method to calculate Z(eff)-an annihilation parameter of positron-atom (or molecule) scattering. These Z(eff) are evaluated from the (N+1)-particle wave function and are calculated in a fully ab initio way (in a quantum chemistry sense). Our first applications are for positron scattering against He atoms and H-2 molecules. Our results for both systems are in excellent agreement with experimental data at thermal energies.
引用
收藏
页码：R1527 / R1530
页数：4
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