Properties of the Positronium Negative Ion Interacting with Exponential Cosine-Screened Coulomb Potentials

被引：0
作者：
Arijit Ghoshal
Y. K. Ho
机构：
[1] Academia Sinica,Institute of Atomic and Molecular Sciences
[2] Burdwan University,Department of Mathematics
来源：
Few-Body Systems | 2009年 / 46卷
关键词：
Positron Annihilation; Screen Effect; Annihilation Rate; Quantum Plasma; Screen Coulomb Potential;
D O I：
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学科分类号：
摘要：
The positronium negative ion (Ps−) in exponential cosine-screened Coulomb potentials (ECSCP) has been theoretically investigated. Using highly correlated wave functions with 525 terms we report binding energies, annihilation rates and several other parameters for various values of the screening parameter. Our reported results for the unscreened case are in nice agreement with some of the most accurate results in the literature. Further we make a comparative study of the properties of Ps− in ECSCP with the corresponding properties in screened Coulomb potential (SCP). To the best of our knowledge, such a study on Ps− in ECSCP is carried out for the first time in the literature.
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页码：249 / 256
页数：7
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