Radiothermoluminescence and Transitions in Polymers |
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Page 4
... intersystem crossing to the lowest triplet state , which gives rise to phosphorescence . In each of these processes , the first state is rearrangement of the electron density in the molecule's electron cloud and conversion of electronic ...
... intersystem crossing to the lowest triplet state , which gives rise to phosphorescence . In each of these processes , the first state is rearrangement of the electron density in the molecule's electron cloud and conversion of electronic ...
Page 5
... intersystem crossing ( therefore , also phosphorescence ) . However , internal conversion from the first excited singlet state is much less likely than among the higher excited singlets , and thus the complete quenching of fluorescence ...
... intersystem crossing ( therefore , also phosphorescence ) . However , internal conversion from the first excited singlet state is much less likely than among the higher excited singlets , and thus the complete quenching of fluorescence ...
Page 46
... intersystem crossing probability , and thus a decrease in fluorescence emission , may result from the perturbation due to increasing temperature [ 66 ] . In a similar way , the perturbation due to an impurity molecule could increase the ...
... intersystem crossing probability , and thus a decrease in fluorescence emission , may result from the perturbation due to increasing temperature [ 66 ] . In a similar way , the perturbation due to an impurity molecule could increase the ...
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Common terms and phrases
activation energy annealing atactic atoms blend changes charge Charlesby Chem chemical cis-polybutadiene components concentration constant cooling copolymer cross-linking crystal decay decrease density depends dielectric distribution dose E/kT electron affinity electron traps emission entropy equilibrium evaluation excited molecules factor first-order fluorescence fraction free volume frequency frequency factor glass glass-transition temperature glow curve glow peak grafting heating increase INTENSITY relative units interaction interfacial intersystem crossing interzonal ionization irradiation isotactic kinetic linear low-temperature luminescence centers LUMINESCENCE INTENSITY relative Macromolecules material maxima maximum mechanical melting method molecular motion molecules Nikolskii nuclear magnetic resonance observed occur oxygen phase phosphorescence Phys polybutadiene polyethylene samples polyisobutylene polypropylene polystyrene position quenching radiation radicals radiothermoluminescence reaction recombination relaxation transitions room temperature secondary relaxation semicrystalline semicrystalline polymers spectra spectroscopy structure temperature thermal thermodynamic thermoluminescence thermoluminescence peaks tion transition temperature trapped electrons untrapping vibrational vinyl vulcanization whereas Zlatkevich
References to this book
Polymer Surfaces and Interfaces II, Volume 2 W. J. Feast,H. S. Munro,R. W. Richards Snippet view - 1993 |