[Effects of chemical sensitization on photoelectron time-resolved spectrum].
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.
Li
Xiao-wei
XW
College of Physics Science and Technology, Hebei University, Baoding 071002, China.
Li
Xin-zheng
XZ
Lai
Wei-dong
WD
Jiang
Xiao-li
XL
Tian
Xiao-dong
XD
Yang
Shao-peng
SP
Fu
Guang-sheng
GS
D000465:Algorithms; D004583:Electrons; D004655:Emulsions; D006046:Gold / Q000737:chemistry*; D017612:Gold Compounds / Q000737:chemistry; D007700:Kinetics; D008962:Models, Theoretical; D055668:Photochemical Processes; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods*; D013455:Sulfur / Q000737:chemistry*; D013885:Thiosulfates / Q000737:chemistry; D013997:Time Factors
D004655:Emulsions; D017612:Gold Compounds; D013885:Thiosulfates; D013455:Sulfur; D006046:Gold