Accurate laboratory ultraviolet wavelengths for quasar absorption-line constraints on varying fundamental constants
Accurate laboratory ultraviolet wavelengths for quasar absorption-line constraints on varying fundamental constants
The most precise method of investigating possible spaceātime variations of the fine-structure constant, Ī±ā” (1/ħc)(e2/4ĻĪµ0), using high-redshift quasar absorption lines is the many-multiplet (MM) method. For reliable results this method requires very accurate relative laboratory wavelengths for a number of UV resonance transitions from several different ionic species. For this ā¦