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The oscillator strengths of 22 Ba-II emission lines were measured in the wavelength regions 1400—2000 Å and 4100—4600 A. The light source was a wall-stabilized cascade arc burning in argon, into which a small quantity of barium vapor was introduced. Standard intensities were produced by the central intensities of optically thick lines and by a carbon arc. The transition probability of the line Ba-II 4554 A, which is known with an accuracy of about 10%, was used to determine the particle density.

Messung der Absorptionsoszillatorenstärken von Ba-II Linien in den Spektralbereichen von 1400—2000 A und von 4100—4600 Å