Arc Measurement of Some Argon Transition Probabilities.

Area of Science:

• Atomic physics
• Plasma spectroscopy
• Spectroscopic diagnostics

Background:

• Accurate transition probabilities are crucial for plasma diagnostics.
• Previous measurements of argon line parameters have shown discrepancies.

Purpose of the Study:

• To measure transition probabilities and line shape parameters for specific argon lines.
• To determine argon level populations using hydrogen line spectroscopy.
• To derive additional argon transition probabilities through relative measurements.

Main Methods:

• Utilized a wall-stabilized argon arc with a trace of hydrogen.
• Employed hydrogen line shape measurements and local thermodynamic equilibrium (LTE) assumption.
• Conducted relative intensity measurements in a pure argon arc.

Main Results:

• Measured transition probabilities and line shape parameters for three primary argon lines.
• Determined argon level populations based on LTE and hydrogen line data.
• Obtained transition probabilities for ten additional argon lines via relative measurements.

Conclusions:

• The study provides new experimental data for argon spectral lines.
• Results are compared with existing literature values.
• Discussion includes potential sources of experimental error and their impact.