Stark broadening of potassium ns-4p and nd-4p lines in a wall-stabilized arc

Journal Article · Sat Sep 01 04:00:00 EDT 1984 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.30.1449· OSTI ID:6175069

Hohimer, J P

Stark-width measurements are reported for lines in the ns-4p (n = 7--10) and nd-4p (n = 5--8) series in neutral potassium (K I). These measurements were made by observing the end-on emission from a low pressure (20 Torr) potassium-argon wall-stabilized arc source. The on-axis electron density and temperature in the 20-A arc were (2.0 +- 0.2) x 10/sup 15/ cm/sup -3/ and 2955 +- 100 K, respectively. The experimentally determined Stark widths were compared with the theoretical values calculated by Griem. The measured Stark widths agreed with theory to within 30% for lines in the ns-4p series; while the measured Stark widths of the nd-4p series lines were only one-third of the theoretical values.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6175069
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 30:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

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74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
BUFFERS
CURRENTS
ELECTRIC ARCS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELEMENTS
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
LINE BROADENING
LINE WIDTHS
METALS
PLASMA DIAGNOSTICS
POTASSIUM
SPECTRA
STARK EFFECT