20.500.12556/DiRROS-16879 Recombination of oxygen atoms on the surface of oxidized polycrystalline nickel—temperature and pressure dependences The recombination of neutral oxygen atoms in the ground state on the oxidized nickel samples was studied experimentally in the range of pressures where the maximum density occurs in weakly ionized low-pressure oxygen plasma, i.e. between 40 and 200 Pa. The recombination coefficient was determined in the flowing afterglow. The source of oxygen atoms was plasma sustained in a quartz tube of inner diameter 4.7 mm by a microwave discharge in the surfatron mode. The recombination coefficient was determined in the afterglow chamber, which was a Pyrex tube with an inner diameter of 36 mm. The density of oxygen atoms in the afterglow chamber was varied by adjusting the discharge power, the gas flow, the pressure, and the position of a recombinator. Such flexibility of the experimental system enabled adjustment of the temperature of the oxidized nickel samples independently from the O-atom density in its vicinity or other parameters. The density of oxygen atoms in the afterglow chamber at various system parameters was determined by the Šorli method, which is reliable, and has an accuracy of about 20%. The recombination coefficient was determined by calorimetry. The coefficient was inversely proportional to the square root of the pressure and exponentially to the sample temperature. Systematic measurements performed at various pressures and temperatures enabled empirical formula, which were explained qualitatively by recombination kinetics. heterogenous surface recombination recombination coefficient nickel nickel oxide temperature temperature nikelj kisik tlak true false true IOP Publishing Ltd Anglija Angleški jezik Slovenski jezik © 2023 The Author(s) Neznano 2023-08-30 08:23:32 2023-08-30 08:23:34 2023-08-31 03:35:47 0000-00-00 00:00:00 2023 0 0 Nasl. z nasl. zaslona; Opis vira z dne 25. 7. 2023; str. 1-13 Vol. 32, [article no.] 075001 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-04-26 2023-06-23 2023-07-06 546.21:532.11+52-335.7 1361-6595 10.1088/1361-6595/ace129 159683331 https://iopscience.iop.org/article/10.1088/1361-6595/ace129#back-to-top-target 1 c02956b9-46ec-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22937 RAZ_Paul_Domen_2023.pdf RAZ_Paul_Domen_2023.pdf 1 48321ACC7839BCA4BC9E0F50C3703D25 16d8a262837f6a81769b1c97d542833bab24a0309621f89cd939a702d598fefc 824c0d1e-46ee-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22938 Institut Jožef Stefan 0 0 0