Abstract
Absolute differential cross sections for the production of D/sup -/ and D/sup 0/ + D/sub 2//sup 0/ have been determined for single and double electron-capture collisions into dissociative states by 1.0- to 5.0-keV D/sub 2/ /sup +/ in Cs vapor. Integrations of the differential cross sections over the angles yield the total cross sections for the production of D/sup -/ and D/sup 0/ + D/sub 2//sup 0/. A theory has been developed of the angular distributions of dissociation fragments resulting from electron capture into dissociative states of diatomic molecular systems. Predictions are made that the angular distribution dsigma/subf//d..omega.. of any fragment f should scale as E/subi//sup -1/ dsigma/subf//d..omega.. = f (E/subi/theta/sup 2/), where E/subi/ is the incident energy of the diatomic molecular ion. The observed distributions fit this scaling law. An interesting structure is found at 23.5 keV deg/sup 2/, which yields information about the dependence of the electron-capture cross section on the internuclear separation of the incident molecular ion during the interaction time. (AIP)
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