Properties of iodine cells contaminated by the heteromolecule /sup 127/I/sup 129/I for metrological applications

Abstract

The influence of contamination of the iodine cell by heteroisotopic molecule is discussed. Numerical model results are compared with measured values for both third (THT) and fifth (FHT) harmonic method of detection. Contamination causes substantially lower frequency shift in the case of FHT.