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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Experimental study of recombination of astrophysically relevant ions with electrons
 Hájek, Daniel ; Dohnal, Petr (advisor) ; Rednyk, Serhiy (referee)
Chemical kinetics model for preparation of H2D+ and HD2 + recombination was created. Model predicted, how the chemistry inside of the apparatus will develop so the best initial conditions for the measurement could be set. Quality of our created model was tested by comparison with previous measurements. Afterward, concentration of H3 + ions in discharge was measured using absorption spectroscopy. During this measurement the kinetic temperature of ions was calculated using Doppler broadening of spectral lines. This measured temperature was compared to the one measured by a temperature sensor positioned on the discharge tube holder. Then, three measurements to find the dissociative recombination rate of kation H3 + were done. These measurements were done on temperatures near 60 K and on pressures of 450 Pa and 550 Pa. When the coefficient was measured, ternary recombination rate was subtracted. The obtained binary recombination rate coefficient was compared to previous measurements and to theory. Our recombination rate, taking uncertainty in to account, well agreed with measurement and theory.
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