Abstract
The n=2 to n=2 transition lines in the Be i ion sequence of moderately-high-Z elements (Cl to Cr) were studied in the emission spectra of the Texas Experimental tokamak plasma when the appropriate elements were injected. A number of lines were identified for the first time. The relative brightnesses of the spectral lines were measured by an instrument with a photoelectric detector which was photometrically calibrated against synchrotron radiation. The brightness ratios of the 2s2p –2 (R) and the 2 –2s2p () transitions to the resonance 2 –2s2p line were determined and compared with theoretical predictions. For R, the ratio of the experimental to the theoretical values was 1.01±0.19 and for , 0.84±0.17, indicating a good agreement with the calculations of relative level populations using collision strengths computed by the distorted-wave approximation.
- Received 3 November 1986
DOI:https://doi.org/10.1103/PhysRevA.35.2919
©1987 American Physical Society