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Experimental study of the dissociative recombination of molecular ions at temperatures relevant to cold interstellar plasma (30 - 300 K)
 Shapko, Dmytro ; Glosík, Juraj (advisor) ; Korolov, Ihor (referee) ; Poterya, Viktoriya (referee)
TITLE: Experimental Study of the Dissociative Recombination of Molecular Ions at Temperatures Relevant to Cold Interstellar Plasma (30 - 300 K) AUTHOR: Mgr. Dmytro Shapko DEPARTMENT: Department of Surface and Plasma Science SUPERVISOR: prof. RNDr. Juraj Glosík, DrSc. ABSTRACT: The dissociative recombination process of N2H+ ions with electrons was investigated using a stationary afterglow combined with a Cavity Ring-Down Spectrometer. We conducted real-time observations of the changes over time in the population densities of various rotational and vibrational states of recombining N2H+ ions. Based on these observations, we determined the rate coefficients for thermal recombination of N2H+ within a temperature range of 80 - 350 K. By employing newly calculated vibrational transition moments of N2H+ , we provided an explanation for the discrepancies observed in previous studies regarding the recombination rate coefficients. Furthermore, our findings indicate that the measured recombination rate coefficient does not exhibit a statistically significant correlation with the number density of the buffer gas. We also conducted a study on the dissociative recombination of H3 + ions with electrons in neon gas at a temperature of 110 K. To perform this investigation, we utilized a new Cryogenic Stationary...
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