Multiple Paths of Deuterium Fractionation in Protoplanetary Disks
Multiple Paths of Deuterium Fractionation in Protoplanetary Disks
Abstract We investigate deuterium chemistry coupled with the nuclear spin-state chemistry of H 2 and <?CDATA ${{\rm{H}}}_{3}^{+}$?> in protoplanetary disks. Multiple paths of deuterium fractionation are found; exchange reactions with D atoms, such as HCO + + D, are effective in addition to those with HD. In a disk model …