Pressure-broadened atomic Li(2s-2p) line perturbed by ground neon atoms in the spectral wings and core

摘要

Full quantum calculations are performed to investigate the broadening profiles of the atomic lithium Li(2s-2p) resonance line induced by interactions with ground Ne (2s22p6) perturbers in the spectral wings and core.The X2Σ+,A2Π,and B2Σ+ potential-energy curves of the two first low lying LiNe molecular states,as well as the corresponding transition dipole moments,are determined with ab initio methods based on the SA-CASSCF-MRCI calculations.The emission and absorption coefficients in the wavelength range 550-800 nm and the line-core width and shift are investigated theoretically for temperatures ranging from 130 K to 3000 K.Their temperature dependence is analyzed,and the obtained results are compared with the previous experimental measurements and theoretical works.