Abstract
Relative values for 49 prominent lines and 21 of the strongest lines have been measured. The measurements were made using a wall-stabilized arc into which the uranium was introduced in the form of U. The values were measured with a flow-stabilized arc which is essentially a free-burning arc stabilized by streaming argon around one of the electrodes which is formed from a molten ball of uranium held in a tungsten cup. Temperatures in the wall-stabilized and flow-stabilized arc were 10 500 K and 5500 K, respectively. The relative values were placed on an absolute scale employing a recent lifetime determination for the 27 887- level of . This absolute scale was extended to the values by measuring the relative intensity of a and a line in the wall-stabilized arc.
- Received 10 February 1975
DOI:https://doi.org/10.1103/PhysRevA.11.1845
©1975 American Physical Society