Abstract

Abstract

The difliculty to reproduce the measured data by a classic-theoretical calculations of mobility of nitrogen ions N+ in dilute atom-gas of helium He at low temperatures T = 4.3 and 77 K mentioned in the work of Tanuma group, prompted us to try quantum calculations to minimize this failure. To do this, we have carried out the calculations of the potential­
energy curves of the low lying states corresponding to the N+ +He ion-atom system using the
SA-CASSCF with MRCI ab initio methods including the Davidson and BSSE corrections. The transport coefficients of the N+ (3P) and N+ (1D) ions in He atom are then carefully determined with special emphasis on the behavior of the reduced mobility with the ratio E /N of the electric field and the gas density and try to explain its observed decrease near the value E/N ,...., 10Td.

Information

Item Type:	Thesis
Divisions:	» Laboratory of Physics for Matter and Radiation » Faculty of Science and Technology
ePrint ID:	2274
Date Deposited:	2020-08-27
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/en/publication/article/2274

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