[Effects of chemical sensitization on photoelectron time-resolved spectrum].
Guang Pu Xue Yu Guang Pu Fen Xi
; 25(6): 815-8, 2005 Jun.
Article
em Zh
| MEDLINE
| ID: mdl-16201347
ABSTRACT
The time-resolved spectra of free photoelectrons and shallow-trapped electrons in the T-grains AgBrI emulsion were simultaneously detected with microwave absorption and dielectric spectrum detection technique. The results indicate that the electron trap effects of sulfur sensitization centers and sulfur-plus-gold sensitization centers are different with equal quantities of Na2S2O3 added. The sulfur sensitization centers acted as a deep electron trap to pick up the electronic decay because of increasing the number of deep trapped electrons, while the sulfur-plus-gold sensitization centers as a shallow electron trap decrease the electronic decay through effectively controlling the recombination between the electrons and the holes. The depth of sulfur-plus-gold sensitization center is shallower than that of sulfur sensitization center after the KAuCl4 is added. The effects of sulfur sensitization center and sulfur-plus-gold sensitization center on the photoelectron decay are different in different sections of decay curves through the change in electron time-resolved spectra.
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Base de dados:
MEDLINE
Assunto principal:
Análise Espectral
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Enxofre
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Elétrons
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Ouro
Idioma:
Zh
Ano de publicação:
2005
Tipo de documento:
Article