PRECISION-MEASUREMENT OF 2 IODINE LINES AT 585 NM AND 549 NM

The transition frequencies of the i-component of the R(99)15-1 and the w-component of the R(85)26-0 transition in the B-X system of molecula r I-127(2) have been determined with an overall relative standard unce rtainty of 1.3 . 10(-10). For this purpose a commercial linear dye las er has been modified and stabilized to the corresponding iodine line. This dye laser serves as a transportable frequency standard which is c ompared with the wavelength standards of the PTB. The evaluation of an experiment for testing special relativity at the test storage ring (T SR) in Heidelberg is based on the precision of the reported interferom etric wavelength comparison.