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.

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页码：R1527 / R1530

页数：4

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