1. H. Langhoff, Opt. Commun. 68, 31 (1988). 2. W. Krotz, A. Ulrich, B. Busch, G. Ribitzki, J. Wie... more 1. H. Langhoff, Opt. Commun. 68, 31 (1988). 2. W. Krotz, A. Ulrich, B. Busch, G. Ribitzki, J. Wieser, Phys. Rev. 443, 6089 (1991). 3. E. V. Savchenko, A.N. Ogurtsov, O.N. Grigorashchenko, S.A. Gubin, Chem. Phys. 189, 415 (1994).
1. I. Ya. Fugol', A.N.Ogurtsov, O.N. Grigorashchenko, and E.V. Savchenko Sov. J. Low Temp. Ph... more 1. I. Ya. Fugol', A.N.Ogurtsov, O.N. Grigorashchenko, and E.V. Savchenko Sov. J. Low Temp. Phys. 18(1), 27 (1992). 2. I. Ya. Fugol', B.V. Savchenko, A. N. Ogurtsov and O.N. Grigorashchenko, Physica B. 190, 347 (1993)
The formation of self-oscillations of temperature and concentration of radicals in an electron-ir... more The formation of self-oscillations of temperature and concentration of radicals in an electron-irradiated methane film at low temperatures has been investigated experimentally and theoretically. Self-oscillations arise due to the activation nature of diffusion and radical recombination processes. Self-oscillations were studied experimentally by measuring the desorption of particles from an irradiated sample and theoretically by solving the kinetic equations for defects in a methane sample. Concentration self-oscillations of two types of particles have been found and investigated; namely, hydrogen atoms and CH3 radicals formed during the irradiation of methane by electrons. It is shown that with an increase in the irradiation intensity, the oscillation periods decrease, and the calculation value are of the order of magnitude observed in the experiment. A model of a manifestation of the self-oscillation of hydrogen molecule concentration during desorption is presented.
The radiation effects and relaxation processes in pre-irradiated by an electron beam solid $$\hbo... more The radiation effects and relaxation processes in pre-irradiated by an electron beam solid $$\hbox {N}_{2}$$N2 have been studied with a focus on the behavior of the so far unidentified emission band at 360 nm. The study was performed using optical and current spectroscopy methods: cathodoluminescence and developed by our group nonstationary luminescence, as well as spectrally resolved thermally stimulated luminescence, and thermally stimulated exoelectron emission. The measurements cover the temperature range of the $$\alpha $$α-phase existence. Activation spectroscopy evidenced connection of the 360 nm band with the neutralization reaction. Possible scenarios of $$\hbox {N}_{4}^{+}$$N4+ neutralization via dissociative recombination are discussed, and interpretation of the 360 nm band is suggested.
The relaxation processes induced by an exposure of the Ar matrices doped with CH4 (0.1 – 10%) to ... more The relaxation processes induced by an exposure of the Ar matrices doped with CH4 (0.1 – 10%) to an electron beam were studied with a focus on the dynamics of radiolysis products – H atoms, H2 molecules, CH radicals, and energy transfer processes. Three channels of energy transfer to dopant and radiolysis products were discussed: by free charge carriers, free excitons and photons from the “intrinsic source” provided by emission of the self-trapped excitons. Radiolysis products along with the total yield of desorbing particles were monitored in a correlated manner. Analysis of methane transformation reactions induced by free excitons showed that the CH radical can be considered as a marker of the CH3 species. The competition between exciton self-trapping and energy transfer to the dopant and radiolysis products has been demonstrated. A nonlinear concentration behavior of the H atoms in doped Ar matrices has been established. Real-time correlated monitoring of optical emissions (H ato...
Abstract Defect formation induced by electronic transitions (DFIET) in rare gas solids (RGS) is s... more Abstract Defect formation induced by electronic transitions (DFIET) in rare gas solids (RGS) is studied by luminescence spectroscopy methods. Permanent point defects are found to be formed via exciton and hole self-trapping. Possible mechanisms of DFIET are discussed.
... 1. Curve (a) is the emission spectrum of pure Ne. The data of papers79 show almost all the ra... more ... 1. Curve (a) is the emission spectrum of pure Ne. The data of papers79 show almost all the radiation of a crystalline neon is in the region of resonance lumi nescence from a free atom. The Stokes shift, relative to the exciton absorption bands equals to 0.6 eV. ...
... References. [1] RE Johnson and J. Schou. Mat. Fys. Medd. Dan. Vid. Selsk., 43 (1993), p. 403.... more ... References. [1] RE Johnson and J. Schou. Mat. Fys. Medd. Dan. Vid. Selsk., 43 (1993), p. 403. [2] Georg Zimmerer. Nucl. Instrum. Meth. Phys. Res. B, 91 (1994), p. 601. [3] KS Song and RT Williams, Self-Trapped Excitons, Springer-Verlag, Berlin (1996). ...
... 3. AS Davydov, Teoriya tverdogo tela (The Theory 12 of Solids), izd. "Nauka", Mosco... more ... 3. AS Davydov, Teoriya tverdogo tela (The Theory 12 of Solids), izd. "Nauka", Moscow (1976). 4. EN Myasnikov,DAN UkrSSR, Ser. A, No. 8, 752 (1976). ... Nauka, Moscow (1976). 4. EN MyasnikovDAN UkrSSR No. 8 (1976), p. 752 Ser. A . 5. H. Sumi Solid State Commun. ...
1. H. Langhoff, Opt. Commun. 68, 31 (1988). 2. W. Krotz, A. Ulrich, B. Busch, G. Ribitzki, J. Wie... more 1. H. Langhoff, Opt. Commun. 68, 31 (1988). 2. W. Krotz, A. Ulrich, B. Busch, G. Ribitzki, J. Wieser, Phys. Rev. 443, 6089 (1991). 3. E. V. Savchenko, A.N. Ogurtsov, O.N. Grigorashchenko, S.A. Gubin, Chem. Phys. 189, 415 (1994).
1. I. Ya. Fugol', A.N.Ogurtsov, O.N. Grigorashchenko, and E.V. Savchenko Sov. J. Low Temp. Ph... more 1. I. Ya. Fugol', A.N.Ogurtsov, O.N. Grigorashchenko, and E.V. Savchenko Sov. J. Low Temp. Phys. 18(1), 27 (1992). 2. I. Ya. Fugol', B.V. Savchenko, A. N. Ogurtsov and O.N. Grigorashchenko, Physica B. 190, 347 (1993)
The formation of self-oscillations of temperature and concentration of radicals in an electron-ir... more The formation of self-oscillations of temperature and concentration of radicals in an electron-irradiated methane film at low temperatures has been investigated experimentally and theoretically. Self-oscillations arise due to the activation nature of diffusion and radical recombination processes. Self-oscillations were studied experimentally by measuring the desorption of particles from an irradiated sample and theoretically by solving the kinetic equations for defects in a methane sample. Concentration self-oscillations of two types of particles have been found and investigated; namely, hydrogen atoms and CH3 radicals formed during the irradiation of methane by electrons. It is shown that with an increase in the irradiation intensity, the oscillation periods decrease, and the calculation value are of the order of magnitude observed in the experiment. A model of a manifestation of the self-oscillation of hydrogen molecule concentration during desorption is presented.
The radiation effects and relaxation processes in pre-irradiated by an electron beam solid $$\hbo... more The radiation effects and relaxation processes in pre-irradiated by an electron beam solid $$\hbox {N}_{2}$$N2 have been studied with a focus on the behavior of the so far unidentified emission band at 360 nm. The study was performed using optical and current spectroscopy methods: cathodoluminescence and developed by our group nonstationary luminescence, as well as spectrally resolved thermally stimulated luminescence, and thermally stimulated exoelectron emission. The measurements cover the temperature range of the $$\alpha $$α-phase existence. Activation spectroscopy evidenced connection of the 360 nm band with the neutralization reaction. Possible scenarios of $$\hbox {N}_{4}^{+}$$N4+ neutralization via dissociative recombination are discussed, and interpretation of the 360 nm band is suggested.
The relaxation processes induced by an exposure of the Ar matrices doped with CH4 (0.1 – 10%) to ... more The relaxation processes induced by an exposure of the Ar matrices doped with CH4 (0.1 – 10%) to an electron beam were studied with a focus on the dynamics of radiolysis products – H atoms, H2 molecules, CH radicals, and energy transfer processes. Three channels of energy transfer to dopant and radiolysis products were discussed: by free charge carriers, free excitons and photons from the “intrinsic source” provided by emission of the self-trapped excitons. Radiolysis products along with the total yield of desorbing particles were monitored in a correlated manner. Analysis of methane transformation reactions induced by free excitons showed that the CH radical can be considered as a marker of the CH3 species. The competition between exciton self-trapping and energy transfer to the dopant and radiolysis products has been demonstrated. A nonlinear concentration behavior of the H atoms in doped Ar matrices has been established. Real-time correlated monitoring of optical emissions (H ato...
Abstract Defect formation induced by electronic transitions (DFIET) in rare gas solids (RGS) is s... more Abstract Defect formation induced by electronic transitions (DFIET) in rare gas solids (RGS) is studied by luminescence spectroscopy methods. Permanent point defects are found to be formed via exciton and hole self-trapping. Possible mechanisms of DFIET are discussed.
... 1. Curve (a) is the emission spectrum of pure Ne. The data of papers79 show almost all the ra... more ... 1. Curve (a) is the emission spectrum of pure Ne. The data of papers79 show almost all the radiation of a crystalline neon is in the region of resonance lumi nescence from a free atom. The Stokes shift, relative to the exciton absorption bands equals to 0.6 eV. ...
... References. [1] RE Johnson and J. Schou. Mat. Fys. Medd. Dan. Vid. Selsk., 43 (1993), p. 403.... more ... References. [1] RE Johnson and J. Schou. Mat. Fys. Medd. Dan. Vid. Selsk., 43 (1993), p. 403. [2] Georg Zimmerer. Nucl. Instrum. Meth. Phys. Res. B, 91 (1994), p. 601. [3] KS Song and RT Williams, Self-Trapped Excitons, Springer-Verlag, Berlin (1996). ...
... 3. AS Davydov, Teoriya tverdogo tela (The Theory 12 of Solids), izd. "Nauka", Mosco... more ... 3. AS Davydov, Teoriya tverdogo tela (The Theory 12 of Solids), izd. "Nauka", Moscow (1976). 4. EN Myasnikov,DAN UkrSSR, Ser. A, No. 8, 752 (1976). ... Nauka, Moscow (1976). 4. EN MyasnikovDAN UkrSSR No. 8 (1976), p. 752 Ser. A . 5. H. Sumi Solid State Commun. ...
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