Forces d'oscillateur du potassium

We describe the results of measurements on emission and absorption of potassium I lines obtained in two series of experiments. The first concerns a low-pressure flame fed by a methane and oxygen mixture, seeded with potassium carbonate, and the other an atmospheric- pressure helium plasma seeded with potassium.A collation of the experimental results of the latter series and Drawin's theory about the conditions of validity for local thermodynamic equilibrium show that the transition-probability values measured by Heiërman are incorrect. Warner's theoretical values are more satisfactory. This study allows us to propose new oscillator strengths for the KI lines corresponding to the following transitions: $\text{4}{}^2\text{P}{}^0{}_{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}\text{? 7}{}^2\text{S}{}_{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}$, $\text{4}{}^2\text{P}{}^0{}_{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}\text{? 10}{}^2\text{S}{}_{\mathrm{<mtext>3</mtext><mtext>2</mtext>}}\text{? 11}{}^2\text{S}{}_{\mathrm{<mtext>1</mtext><mtext>2</mtext>}}$ of the sharp series and $\text{4}{}^2\text{P}{}^0{}_{\mathrm{<mtext>3</mtext><mtext>2</mtext>}}\text{? 6}{}^2\text{D}{}_{\mathrm{<mtext>3</mtext><mtext>2</mtext><mtext>5</mtext><mtext>2</mtext>}}$ of the diffuse series.