Experimental Stark widths and shifts of uv and vuv carbon I lines (resonance transitions 2p3s /sup 3/P/sup o//sub 0/ /sub 1/ /sub 2/--2P/sup 2/ /sup 3/P/sub 0/ /sub 1/ /sub 2/ and transitions to low-lying quantum states)

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.16.627· OSTI ID:7318761

Nubbemeyer, H; Wende, B

We have measured Stark broadening and shift parameters for spectral lines of the C I resonance multiplet 2p3s /sup 3/P/sup o//sub 012/--2P/sup 2/ /sup 3/P/sub 012/ as well as for lines corresponding to transitions to low-lying quantum states. The lines were emitted under approximately optically thin conditions from a dense equilibrium plasma (wall-stabilized arc; electron number density, 6.1 x 10/sup 22/ m/sup -3/ < or = n/sub e/ < or = 2.1 x 10/sup 23/ m/sup -3/; temperature, 11 700 K < or = T < or = 16 000 K). As predicted by the theory, the Stark widths and shifts for different lines of the resonance multiplet at approx. 165 nm were found to be equal within the experimental uncertainty. The experimental values for these lines agree well with recent calculations by Griem. For n/sub e/ = 10/sup 23/ m/sup -3/ the experimental (full) half-width amounts to (4.0 +- 0.7) x 10/sup -3/ nm and the red shift (1.9 +- 0.3) x 10/sup -3/ nm. A significant deviation from Griem's calculation was only found for C I at 175.19 nm (/sup 1/P/sup o/-/sup 1/S), for which the measured shift is larger by a factor of 2. For this line, the calculations by Wilson and Nicolet approximately agree with the results of this study.

• Research Organization: Physikalisch-Technische Bundesanstalt, Institut Berlin, D-1000 Berlin 10, Abbestrasse 2-12, Germany
• OSTI ID: 7318761
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 16:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

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74 ATOMIC AND MOLECULAR PHYSICS
CARBON
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EQUILIBRIUM PLASMA
LINE BROADENING
LINE WIDTHS
NONMETALS
OPTICALLY THIN PLASMA
PLASMA
PLASMA DIAGNOSTICS
SPECTRAL SHIFT
STARK EFFECT