Collisional broadening of alkali doublets by helium perturbers

Details Collisional broadening of alkali doublets by helium perturbers Collisional broadening of alkali doublets by helium perturbers

2006-09-29

arxiv.org/abs/physics/0609251v2

Physics

Atomic Physics

12 pages, 6 figures

Scientific paper

We report results for the Lorentzian profiles of the Li I, Na I and K I doublets and the Na I subordinate doublet broadened by helium perturbers for temperatures up to 3000 K They have been obtained from a fully quantum-mechanical close-coupling description of the colliding atoms, the Baranger theory of line shapes and new ab initio potentials for the alkali-helium interaction. For all lines except the 769.9 nm K I line, the temperature dependence of the widths over the range 70 < T < 3000 K is accurately represented by the power law form w=aT^b with 0.37 < b < 0.43. The 769.9 K I line has this form for 500 < T < 3000 K with b = 0.49. Although the shifts have a more complex temperature dependence, they all have the general feature of increasing with temperature above T=500 K apart from the 769.9 K I line whose shift decreases with temperature.

Affiliated with

Also associated with

No associations

Rating

Collisional broadening of alkali doublets by helium perturbers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Collisional broadening of alkali doublets by helium perturbers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collisional broadening of alkali doublets by helium perturbers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-184777