FeTi_1-O_2（= 0.00,0.05,0.10） nanocomposites are synthesized using a sol-gel method involving an ethanol solvent in the presence of ethylene glycol as the stabilizer,and acetic acid as the chemical reagent.Their stru...FeTi_1-O_2（= 0.00,0.05,0.10） nanocomposites are synthesized using a sol-gel method involving an ethanol solvent in the presence of ethylene glycol as the stabilizer,and acetic acid as the chemical reagent.Their structural and optical analyses are studied to reveal their physicochemical properties.Using the x-ray diffractometer（XRD）analysis,the size of the nanoparticles（NPs） is found to be 18-32 nm,where the size of the NPs decreases down to 18 nm when Fe impurity of up to 10% is added,whereas their structure remains unchanged.The results also indicate that the structure of the NPs is tetragonal in the anatase phase.The Fourier transform infrared spectroscopy analysis suggests the presence of a vibration bond（Ti-O） in the sample.The photoluminescence analysis indicates that the diffusion of Fe^（3＋） ions into the TiO_2 matrix results in a decreasing electron-hole recombination,and increases the photocatalytic properties,where the best efficiency appears at an impurity of10%.The UV-diffuse reflection spectroscopy analysis indicates that with the elevation of iron impurity,the band gap value decreases from 3.47 eV for the pure sample to 2.95 eV for the 10 mol% Fe-doped TiO_2 NPs.展开更多
Unknown β delayed proton precursor 121 Ce was produced via the reaction of 92 Mo( 32 S, 3n), and identified by an He jet fast tape transport system with "P γ" coincidence measurements. The half life of 121...Unknown β delayed proton precursor 121 Ce was produced via the reaction of 92 Mo( 32 S, 3n), and identified by an He jet fast tape transport system with "P γ" coincidence measurements. The half life of 121 Ce decay was determined to be (1.1±0.1)s. Its energy spectrum of β delayed protons was measured and the β delayed proton branching ratio for 121 Ce decay was roughly estimated to be ～1%. After β delayed proton decay of the precursors \{ 119 Ba,\} \{ 121 Ba\} and 122 La, some of γ transitions from low lying states to the ground states in their "daughters" were observed for the first time.展开更多
文摘FeTi_1-O_2（= 0.00,0.05,0.10） nanocomposites are synthesized using a sol-gel method involving an ethanol solvent in the presence of ethylene glycol as the stabilizer,and acetic acid as the chemical reagent.Their structural and optical analyses are studied to reveal their physicochemical properties.Using the x-ray diffractometer（XRD）analysis,the size of the nanoparticles（NPs） is found to be 18-32 nm,where the size of the NPs decreases down to 18 nm when Fe impurity of up to 10% is added,whereas their structure remains unchanged.The results also indicate that the structure of the NPs is tetragonal in the anatase phase.The Fourier transform infrared spectroscopy analysis suggests the presence of a vibration bond（Ti-O） in the sample.The photoluminescence analysis indicates that the diffusion of Fe^（3＋） ions into the TiO_2 matrix results in a decreasing electron-hole recombination,and increases the photocatalytic properties,where the best efficiency appears at an impurity of10%.The UV-diffuse reflection spectroscopy analysis indicates that with the elevation of iron impurity,the band gap value decreases from 3.47 eV for the pure sample to 2.95 eV for the 10 mol% Fe-doped TiO_2 NPs.
文摘Unknown β delayed proton precursor 121 Ce was produced via the reaction of 92 Mo( 32 S, 3n), and identified by an He jet fast tape transport system with "P γ" coincidence measurements. The half life of 121 Ce decay was determined to be (1.1±0.1)s. Its energy spectrum of β delayed protons was measured and the β delayed proton branching ratio for 121 Ce decay was roughly estimated to be ～1%. After β delayed proton decay of the precursors \{ 119 Ba,\} \{ 121 Ba\} and 122 La, some of γ transitions from low lying states to the ground states in their "daughters" were observed for the first time.
