Wavelength measurements of three iodine lines between 780 nm and 795 nm

摘要

The vacuum wavelengths of hyperfine components of three different rovibronic transitions of the B0+↓(u)-X↑(1)×↓(+)↓(g)spectrum of molecular ↑(127)I2 in the near-infrared were determined with a relative standard uncertainty of δλ/λ=1.3×10↑(-10). The measurements were performed by interferometric wavelength comparison using as standards an iodine-stabilized He-Ne laser at 633 nm and a dye laser stabilized to the intercombination line of Ca at 657 nm. The vacuum wavelengths of hyperfine component al0 of the R(96) lines of both the (0-14) and (0-15) bands and the component a↓(1) of the P(166) line of the (0-14) band were determined to be 781.488441 03(10) nm, 793.52791044(10) nm and 790.10981276(10)nm, respectively.