Oxygen-driven relaxation processes in pre-irradiated Ar cryocrystals

Savchenko, E. V.; Белов, А. Г.; Gumenchuk, G. B.; Ponomaryov, A. N.; Bondybey, V. E.

doi:10.1063/1.2389016

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…A pronounced maximum at 23 K in VUV TSL yield deserves special attention. Discussion of its origin extends over ten years (e.g., refs , , and − and references therein). This maximum was also observed in thermally stimulated chemiluminescence of oxygen in Ar matrix. − The feature emerged in any relaxation emission: intrinsic charge recombination emission (VUV TSL), , thermally stimulated conductivity TSC, and TSEE. , A high sensitivity of this peak to the presence of oxygen when measuring intrinsic relaxation emissions was found.…”

Section: Resultsmentioning

confidence: 99%

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Charging Effects in an Electron Bombarded Ar Matrix and the Role of Chemiluminescence-Driven Relaxation

et al. 2011

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The relaxation processes in pure and doped Ar films preirradiated by an electron beam are studied with the focus on charging effects. Correlated real time measurements have been performed applying current and optical activation spectroscopy methods. Thermally stimulated exoelectron emission and thermally stimulated luminescence are detected in the vacuum ultraviolet and visible range. An appreciable accumulation of electrons in the matrix is found, and prerequisites for negative space charge formation are ascertained. The part played by pre-existing and radiation-induced defects as well as dopants is considered and the temperature range of the electron trap stability is elucidated. It is shown that laser-induced electron detachment from O(-) centers results in an enhancement of electron detrapping via the chemiluminescence mechanism, viz. neutralized and thermally mobilized O atoms recombine. Formation of O(2)* results in the emission of visible photons. These photons act as a stimulating factor for electron release and transport, terminating in exoelectron emission and charge recombination. Chemiluminescence therefore plays an important role in the decay of charged centers.

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Section: Resultsmentioning

confidence: 99%

“…As an example, negative charge accumulates due to surface adsorbed oxygen . A strong effect of oxygen admixture on the relaxation of charged species was found . The scenario put forward is triggering of relaxation cascades by chemiluminescence.…”

Section: Introductionmentioning

confidence: 99%

Charging Effects in an Electron Bombarded Ar Matrix and the Role of Chemiluminescence-Driven Relaxation

et al. 2011

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Complementary and Emerging Techniques for Astrophysical Ices Processed in the Laboratory

et al. 2013

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Electron traps in solid Xe

Khyzhniy

Uyutnov

Savchenko

et al. 2009

Low Temperature Physics

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Correlated real-time measurements of thermally stimulated luminescence and exoelectron emission from solid Xe pre-irradiated with an electron beam are performed. The study enables us to distinguish between surface and bulk traps in solid Xe and to identify a peak related to electronically induced defects. The activation energy corresponding to annihilation of these defects is estimated by the following methods: the method of different heating rates, the initial-rise method, and the curve cleaning technique with fitting of the thermally stimulated luminescence glow curve.

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Oxygen-driven relaxation processes in pre-irradiated Ar cryocrystals

Cited by 4 publications

References 11 publications

Charging Effects in an Electron Bombarded Ar Matrix and the Role of Chemiluminescence-Driven Relaxation

Charging Effects in an Electron Bombarded Ar Matrix and the Role of Chemiluminescence-Driven Relaxation

Complementary and Emerging Techniques for Astrophysical Ices Processed in the Laboratory

Electron traps in solid Xe

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