Instituto di Metrologia “Gustavo Colonnetti” (CNR), Turin, Italy
Instituto Elettrotecnico Nazionale “Galileo Ferraris”, Turin, Italy
Abstract:
The frequencies of the most intense RuO4 transitions in coincidence with the emission lines of CO2 and N2O lasers have been measured with respect to the CO2 lines with an uncertainty of less than 3× 10-9. Difference and absolute frequency values are here reported.