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Transition Probabilities in Argon I.

C H Corliss1, J B Shumaker1

  • 1Institute for Basic Standards, National Bureau of Standards, Washington, D.C. 20234.

Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
|December 12, 2019
PubMed
Summary
This summary is machine-generated.

New measurements of argon I (Ar I) transition probabilities were performed using a high current arc. These data enabled the derivation of 240 Ar I transition probabilities, improving upon existing values.

Keywords:
Argonatomic spectratransition probabilities

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Area of Science:

  • Atomic physics
  • Spectroscopy
  • Plasma physics

Background:

  • Accurate transition probabilities are crucial for interpreting spectral line intensities.
  • Previous studies by Dieke and Crosswhite provided foundational Ar I intensity measurements.
  • High-level transitions in Ar I require precise probability data for accurate modeling.

Purpose of the Study:

  • To derive new, accurate transition probabilities for Ar I lines.
  • To determine relative level populations in Ar I discharges.
  • To expand the database of Ar I transition probabilities in the 4100–9800 Å range.

Main Methods:

  • Measurement of new transition probabilities for 26 Ar I lines using a high current constricted arc.
  • Determination of Ar I relative level populations based on measured intensity data.
  • Derivation of transition probabilities for 240 Ar I lines.

Main Results:

  • New transition probabilities for 26 high-level Ar I lines were experimentally determined.
  • Relative level populations of Ar I were calculated from experimental data.
  • Transition probabilities for 240 Ar I lines were derived and compared with existing literature values.

Conclusions:

  • The study provides an updated and expanded set of Ar I transition probabilities.
  • The derived values enhance the accuracy of spectroscopic analysis of Ar I.
  • New experimental data validate and refine existing knowledge of Ar I spectral properties.