Some aspects of electron tunnelling in radiation chemistry of glassy matrices

Stradowski, Cz.; Kroh, J.

doi:10.1016/0146-5724(78)90032-8

Radiation Physics and Chemistry (1977)

1978

DOI: 10.1016/0146-5724(78)90032-8

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Some aspects of electron tunnelling in radiation chemistry of glassy matrices

Cz. Stradowski

J. Kroh

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1980

1981

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Cited by 12 publications

References 53 publications

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Kinetics of Flash‐Stimulated Changes of F‐Centre Absorption in γ‐Irradiated KCl

Werner¹,

Stradowski²,

Sugier³

1980

Physica Status Solidi (b)

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The decay of P--centres, produced by flashing the y-irradiated KCI crystaIs is studied in the microsecond regime a t room temperature. The kinetics of the decay of F--and recovery of I?-centre absorption bands are compared and a scheme of reactions in the system investigated is proposed, The decay of flash produced F--centres leads initially mainly t o the recovery of the F-band, probably via tunnelling of an electron to an anion vacancy on relatively long distances. The excess energy, released after tunnelling, allows P-centres subsequently to diffuse and form aggregates. Another possibility is the migration of F-centres in electronically excited 2p state, leading also to the formation of aggregate centres.Es w-ird das Abklingen der durch Blitzphotolyse in y-bestrahlten KCI-Kristallen produzierten F--Zentren im Mikrosekundenbereich bei Zimmertemperatar untersucht. Die Abklingkinetik der F--Zentren und der Wiederaufbau der F-Absorptionsbanden werden verglichen und ein Reaktionsschema wird vorgeschlagen. Das Abklingen der durch die Blitzphotolyse produzierten F--Zentren fuhrt anfangs hauptskehlich zum Wiederaufbau der F-Bande wahrscheinlich durch Tunneln des Elektrons zur Anionenldcke auf relativ grol3e Entfernungen. Die nach dem Tunneln gewonnene UberschuSenergie erlaubt die Diffusion der F-Zentren und Aggregatbildung. Die Wanderung der F-Zentren in den elektronischen Anregiingszustand 2p, die eine andere Moglichkeit bietet, fuhrt ebenfalls zur Bildung von Aggregaten.

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Kinetics of Flash‐Stimulated Changes of F‐Centre Absorption in γ‐Irradiated KCl

Werner¹,

Stradowski²,

Sugier³

1980

Physica Status Solidi (b)

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Contribution of quantum effects to the mechanism of positronium reactions

Berlin

Kevdina

Shantarovich

1981

Chemical Physics Letters

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Temperature dependent spectral changes of electrons trapped in aqueous glasses

Stradowski

Kroh

1980

Radiation Physics and Chemistry (1977)

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Some aspects of electron tunnelling in radiation chemistry of glassy matrices

Cited by 12 publications

References 53 publications

Kinetics of Flash‐Stimulated Changes of F‐Centre Absorption in γ‐Irradiated KCl

Kinetics of Flash‐Stimulated Changes of F‐Centre Absorption in γ‐Irradiated KCl

Contribution of quantum effects to the mechanism of positronium reactions

Temperature dependent spectral changes of electrons trapped in aqueous glasses

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