ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The excitation functions for the crossed beam reactions of Sr+CH3I, CD3I, and CH3Br have been investigated over the collisional energy (ET) range 0.1 to ∼1.0 eV. A highly sensitive single photon ionization technique has been developed to detect the reaction products (SrI and SrBr). The integrated total reaction cross sections (σR) exhibit very different behavior in reactions with CH3I vs CH3Br. In the reaction of Sr+CH3I, σR decreases sharply with increasing ET to a minimum near 0.35±0.05 eV and then gradually increases with increasing ET. In the isotopically substituted reactant, CH3I, no difference in the excitation function is seen within the resolution of the experiment. However, for the reaction Sr+CH3Br, σR exhibits a threshold around 0.12±0.05 eV and gradually increases with increasing ET. The present data for the Sr reactions with CH3I and CH3Br are compared with analogous alkali metal reactions and with several theoretical models.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.462090
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