Radiothermoluminescence and Transitions in Polymers |
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Page 34
... Recombination in Organic Substances The radiothermoluminescence glow curve is essentially a plot of the rate of ion re- combination in a material as a function of temperature , although not all ions present will give luminescence on ...
... Recombination in Organic Substances The radiothermoluminescence glow curve is essentially a plot of the rate of ion re- combination in a material as a function of temperature , although not all ions present will give luminescence on ...
Page 35
... recombination rate and recombination rate constant are , respectively [ 68 ] : and dn / dt = − Kn2 - K = S ' exp ( -E / kT ) ( 3.13 ) ( 3.14 ) where S ' , the pre - exponential factor , is a constant with dimensions of cubic centi ...
... recombination rate and recombination rate constant are , respectively [ 68 ] : and dn / dt = − Kn2 - K = S ' exp ( -E / kT ) ( 3.13 ) ( 3.14 ) where S ' , the pre - exponential factor , is a constant with dimensions of cubic centi ...
Page 49
... recombination . However , since the irradiated polymers do not contain charges captured in the traps from which they could be released by thermal activation , already the initial low - temperature recombination involves charges ...
... recombination . However , since the irradiated polymers do not contain charges captured in the traps from which they could be released by thermal activation , already the initial low - temperature recombination involves charges ...
Contents
Preface | 5 |
Application of Radiothermoluminescence to the Study | 6 |
1 | 11 |
Copyright | |
11 other sections not shown
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Common terms and phrases
absorption activation energy amorphous annealing atactic atoms bleaching blend changes charge Charlesby Chem chemical chemically trapped components concentration constant copolymer cross-linking crystal crystalline decay decrease depends dielectric dipoles distribution dose effect electron affinity electron traps electron-spin resonance emission entropy equilibrium excited molecules excited singlet first-order fluorescence free radicals free volume frequency factor glass glass-transition temperature glow curve glow peak increase INTENSITY relative units interaction interfacial intersystem crossing interzonal ionization irradiation isothermal kinetic light linear low temperatures luminescence luminescence centers LUMINESCENCE INTENSITY relative Macromolecules material maxima maximum mechanical method molecular motion molecules Nikolskii nuclear magnetic resonance observed occur oxygen phase phosphorescence Phys polar polybutadiene polyethylene samples polymer polypropylene quenching radiation radiothermoluminescence reactions recombination region relaxation transitions secondary relaxation semicrystalline Solprene spectra spectroscopy spectrum structure thermal thermodynamic thermoluminescence thermoluminescence intensity thermoluminescence peaks tion transition temperature trapped electrons triplet untrapping vibrational vulcanization whereas
References to this book
Polymer Surfaces and Interfaces II, Volume 2 W. J. Feast,H. S. Munro,R. W. Richards Snippet view - 1993 |