Recombination Fluorescence in Ultracold Neutral Plasmas
Journal Article
·
· Physical Review Letters
- Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602 (United States)
- Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)
We present the first measurements and simulations of recombination fluorescence from ultracold neutral calcium plasmas. This method probes three-body recombination at times less than 1 {mu}s, shorter than previously published time scales. For the lowest initial electron temperatures, the recombination rate scales with the density as n{sub 0}{sup 2.2}, significantly slower than the predicted n{sub 0}{sup 3}. Recombination fluorescence opens a new diagnostic window in ultracold plasmas. In most cases it probes deeply bound level populations that depend critically on electron energetics. However, a perturbation in the calcium 4snd Rydberg series allows our fluorescence measurements to probe the population in weakly bound levels that result just after recombination.
- OSTI ID:
- 21134133
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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