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Argon and water sorption with Apollo sample 10084

Presentation #101.04 in the session Moon & Earth I (Oral Presentation)

Published onOct 23, 2023
Argon and water sorption with Apollo sample 10084

This presentation will describe results from temperature programmed desorption (TPD) experiments probing Apollo sample 10084 with argon and water. This is believed to be the only experiment of this type to have been performed with argon and a lunar sample. A very thin layer of sample powder was loaded into ultra-high vacuum in the Regolith Optical and Sorption Experiments (ROSE) setup at Southwest Research Institute. The sample was exposed to varying amounts of the probe gases and at a variety of temperatures, then heated at a controlled rate to induce and monitor desorption of any adsorbed gas. Results are consistent with sorption of the gases to a variety of adsorption sites on the grain surfaces. Analysis to determine the desorption activation energies is underway, and the latest interpretations will be presented at the meeting. This work was supported by a combination of SwRI-internal and NASA SSW program support (Grant 80NSSC18K0947).

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