Total and ionization cross-sections of N2 and CO by positron impact: Theoretical investigations

Pramana

Harshit N Kothari1¹  K N Joshipura¹ 

[1] Department of Physics, Sardar Patel University, Vallabh Vidyanagar 388120, India$$

关键词: Positron scattering;    total cross-sections;    ionization cross-sections;    elastic cross-sections.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

In this paper we report our calculations on several important total cross-sections (TCS𝑠) of positron impact on isoelectronic N2 and CO molecules, treated in the complex spherical potential formalism. Basically the total (complete) cross-section 𝑄T consists of elastic and inelastic contributions. Our total inelastic cross-section (𝑄inel) contains ionization and electronic excitations together with positronium formation. Our goal here is to bifurcate 𝑄inel further to deduce total ionization cross-section, using the `complex scattering potential–ionization contribution’ (CSP-ic) method of electron–atom/molecule scattering. The present range of positron energy is 15–2000 eV. All the resulting cross-sections are in a good general accord with the existing data. This work highlights the importance of various scattering channels in 𝑒+ - 𝑁2 and 𝑒+ - CO interactions at intermediate and high energies.

【 授权许可】

Unknown