The ratio of line strengths for the two argon transitions, ${3p}^5{(}^2{P}_{1/2}^o\left)4s\right[1/2{]}_1^o\to {3p}^5{(}^2{P}_{3/2}^o\left)4p\right[3/2{]}_2$ at wavelength 922.7 nm and ${3p}^5{(}^2{P}_{1/2}^o\left)4s\right[1/2{]}_1^o\to {3p}^5{(}^2{P}_{3/2}^o\left)4p\right[5/2{]}_2$ at wavelength 978.7 nm, is measured in an argon pulsed discharge with the use of a single-mode Ti:sapphire laser. The result 3.29(0.13) is in agreement with our theoretical prediction 3.23 and with a less accurate ratio 2.89(0.43) from the NIST database.

• Received 6 August 2002

DOI:https://doi.org/10.1103/PhysRevA.67.032505