P-Wave Positron-Hydrogen Scattering, Annihilation, and Positronium Formation

Atoms

Anand K. Bhatia¹ 

[1] Heliophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA;

关键词: positron scattering;    annihilation;    positronium formation;   

DOI  :  10.3390/atoms5020017

来源: DOAJ

【 摘 要 】

In a previous paper (Bhatia A.K. 2016), a hybrid theory for the scattering of positrons from hydrogen atoms was applied to calculate S-wave phase shifts, annihilation, and positronium formation cross sections. This approach is now being applied to calculate P-wave positron-hydrogen scattering. The present results, obtained using short-range correlation functions along with long-range correlations in the Schrödinger equation at the same time, agree very well with the results obtained in an earlier calculation by Bhatia et al. (1974), using the Feshbach projection operator formalism. In these earlier calculations, the correction due to the long-range correlations was applied to the variational results. In spite of the fact that this ad hoc correction destroyed the variational bound, the final results have been considered accurate. Annihilation cross-sections, positronium formation cross-sections, calculated in the distorted-wave approximation, are also presented.

【 授权许可】

Unknown