Wavelengths and Energy Levels of Ar I and Ar II based on New Interferometric Measurements in the Region 3 400-9 800 Å

摘要: Wavelengths of 233 lines in the Ar I spectrum and 354 II spectrum, excited a water-cooled hollow cathode at pressure 0.2 torr, have been measured by means Fabry-Perot interferometer vacuum. Fourteen different etalon spacers between 5 70 mm length, two pairs plates three coatings used during investigation. Reference obtained from calibrated electrodeless lamp containing Kr86 torr. By wavelengths values 80 energy levels 153 derived, uncertainty relative varying few tenthousandths to thousandths cm-1. For both spectra these level then obtain calculated wavelengths, extending down 1 557 A case II. The 3d 5s ArI, most which are inaccessible photographic region, redetermined new 4p-levels using interferometric measurements photo-electric infrared published Humphreys Paul, Littlefield Rowley, Peck et al.