Transition probabilities of Re II spectral lines
Table 1. Transition probabilities of Re II spectral lines. The names adopted here for the levels are those of NIST; thus, sequential numbers are assigned instead of term designations for those levels that have no meaningful names. The experimental values obtained in this work are compared to those from  and to the theoretical values from .
Experimental transition probabilities for 37 spectral lines of Re II (15 measured for the first time) have been obtained from a plasma produced by ablation of a Zn–Re alloy with a Nd:YAG laser. The plasma evolved in air at atmospheric pressure, and measurements were performed for the following plasma parameters: an electron density of (1.27 ± 0.19) × 1017 cm−3 and an electron temperature of 11 200 ± 400 K. The relative intensities were placed on an absolute scale by the combining branching fractions with the measured lifetimes and by comparing well-known lines using the plasma temperature. Some plasma parameters, such as the temperature and the electron density, were also obtained to provide a local thermodynamic equilibrium environment and an optically thin plasma. Comparisons were made to previously obtained experimental and theoretical values wherever possible.