title: Optical and electron spin resonance studies of xenon-nitrogen-helium condensates containing nitrogen and oxygen atoms.
abstract: We present the first observations of excimer XeO* molecules in molecular nitrogen films surrounding xenon cores of nanoclusters. Multishell nanoclusters form upon the fast cooling of a helium jet containing small admixtures of nitrogen and xenon by cold helium vapor (T = 1.5 K). Such nanoclusters injected into superfluid helium aggregate into porous impurity-helium condensates. Passage of helium gas with admixtures through a radio frequency discharge allows the storage of high densities of radicals stabilized in impurity-helium condensates. Intense recombination of the radicals occurs during destruction of such condensates and generates excited species observable because of optical emission. Rich spectra of xenon-oxygen complexes have been detected upon destruction of xenon-nitrogen-helium condensates. A xenon environment quenches metastable N((2)D) atoms but has a much weaker effect on the luminescence of N((2)P) atoms. Electron spin resonance spectra of N((4)S) atoms trapped in xenon-nitrogen-helium condensates have been studied. High local concentrations of nitrogen atoms (up to 10(21) cm(-3)) stabilized in xenon-nitrogen nanoclusters have been revealed.
authors.affiliation: †Branch of Talroze Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia.|‡Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412, Russia.
authors.forename: Roman E
authors.initials: RE
authors.lastname: Boltnev
authors.affiliation: †Branch of Talroze Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia.
authors.forename: Igor B
authors.initials: IB
authors.lastname: Bykhalo
authors.affiliation: †Branch of Talroze Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia.
authors.forename: Irina N
authors.initials: IN
authors.lastname: Krushinskaya
authors.affiliation: †Branch of Talroze Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia.|‡Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412, Russia.
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Pelmenev
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Khmelenko
authors.forename: Shun
authors.initials: S
authors.lastname: Mao
authors.forename: Adil
authors.initials: A
authors.lastname: Meraki
authors.forename: Scott C
authors.initials: SC
authors.lastname: Wilde
authors.forename: Patrick T
authors.initials: PT
authors.lastname: McColgan
authors.forename: David M
authors.initials: DM
authors.lastname: Lee