The importance of OH radical–neutral low temperature tunnelling reactions in interstellar clouds using a new model

摘要: Recent laboratory experiments using a pulsed Laval nozzle apparatus have shown that reactions between neutral molecule and the radical OH can occur efficiently at low temperatures despite activation energy barriers if there is hydrogen-bonded complex in entrance channel which allows system to tunnel under barrier. Since major interstellar medium, this class of may well be important chemistry occurs gas phase clouds. Using new gas-grain chemical network with both gas-phase on surfaces dust particles, we studied role OH–neutral dense clouds 10, 50, 100 K. We determined least one these significant, especially lowest studied, where rate constants are large. It was found particular reaction CH3OH provides an effective unambiguous route production...