An ion source contains two isotopes of magnesium: 12 25 Mg (23.98504 u) and 12 Mg (24.98584 u). These ions travel undeflected through the velocity selector (|B|=0.850 T, |E|= 4.60 x 105 V/m) of a mass spectrometer. If both ions are doubly charged, how far apart are the ions in the ion detector