Bestimmung von Oszillatorenstärken durch Lebensdauermessungen der ersten angeregten Niveaus für die Elemente Ba, Sr, Ca, In und Na

Abstract

The lifetimes of the first excited state of the elements Ca, Sr, Ba, In and Na were measured with the method ofOsberghaus ¹. Oscillator strengthes (f) of resonance lines were computed from the measured lifetimes (τ).

The measurements were corrected for imprisonment of radiation in the investigated vapor. The error of the τ-values was estimated to be approximately three percent. We got following resultslifetimes for Ca 4¹ P ₁ (4·67±0·11)·10⁻⁹sec, for Sr 5¹ p ₁ (4·56±0·21)·10⁻⁹ sec, for Ba 6¹ p ₁ (8·36±0·25)·10⁻⁹sec, for In 6² S _1/2 (8·531±0·085)·10⁻⁹sec and for Na 3² P-dublett (1·59±0·039)·10⁻⁸sec.

For the Na 3² P-dublett the dependency of the lifetime on the pressure of foreign gases (N₂, C₃H₈, C₆H₅−CH₃) was studied.