Low-temperature thermoluminescence in solid argon: Short-range mobility of atoms

Abstract

Experimental and theoretical investigations of rate coefficients of the reaction S ( 3 P )+ O 2 in the temperature range 298-878 K

Formation of HArF in solid Ar revisited: Are mobile vacancies involved in the matrix-site conversion at 30 K?

“…As compared with global motion, local ͑short-range͒ mobility has different ͑less strict͒ energetic restriction. 18 HArF SS prepared from HF SS is connected with the vacancy by strain, and the vacancy can move to HArF and react with it at rather low temperatures ͑below 30-32 K͒ hence producing the stable configuration. This process of strain-assisted lowtemperature mobility was discussed in the literature with respect to geminate recombination in matrix-isolation studies.…”

Photochemistry of HNCO in Solid Xe: Channels of UV Photolysis and Creation of H2NCO Radicals

“…A similar situation occurs, for example, in photolysis of H 2 S 2 where lightinduced short-range mobility of the sulfur atoms is observed after photolysis. 45 In the prolonged photolysis, NCO is decomposed to NO and C as evidenced by a rise of monomeric NO. In the 193 nm photolysis, this process is very slow compared to decomposition of the precursor as it can be seen in Figure 6.…”

Selective and reversible control of a chemical reaction with narrow-band infrared radiation: HXeCC radical in solid xenon

“…14,15 It follows that this recovery process involves short-range ͑local͒ atomic mobility, which needs lower activation energies. 16 The absence of global mobility of hydrogen atoms here is further evidenced by the fact that no essential losses of the HXeCC concentration occurs after numerous decomposition-recovery cycles. The hydrogen atom dissociated from HXeCC by IR light is most probably stabilized in an interstitial matrix site sharing the same Xe atom with the "substitutional" CC molecule as it was discussed for the case of HXeI.…”

“…6,9,10 A similar lightinduced reaction of shortly-separated two sulfur atoms was found upon sulfur electronic excitation at 456 nm in solid Ar. 16 In that study, the participation of the laser-excited lattice phonons in the S 2 formation was indicated by the broad and intense phonon band. In the present work, the profile represents the zero-phonon line, and the interaction with the surrounding is probably enhanced due to participation of one lattice atom in the excited XeC 2 molecule.…”