There are six independent constituents with 4 chemical elements, i.e. PuH 2.7 (s), PuN(s), Pu 2O 3(s), N 2, O 2 and H 2, therefore , the system described involves of 2 independent reactions ,both ΔG°0. The cal...There are six independent constituents with 4 chemical elements, i.e. PuH 2.7 (s), PuN(s), Pu 2O 3(s), N 2, O 2 and H 2, therefore , the system described involves of 2 independent reactions ,both ΔG°0. The calculated equilibrium compositions are in agreement with those of the experimental, which indicates that the chemical equilibrium is nearly completely approached. Therefore, it is believed that the reaction rate of plutonium hydride with air is extremely rapid. The present paper has briefly discussed the simultaneous reactions and its thermodynamic coupling effect.展开更多
By using active carbon powder as ionization enhance matter, the detect sensitivity of 239Pu ,which was 0.5 pg (1±0.15, 95% confidence level), was about 20 times that of the tradition method. The sub-picogram plut...By using active carbon powder as ionization enhance matter, the detect sensitivity of 239Pu ,which was 0.5 pg (1±0.15, 95% confidence level), was about 20 times that of the tradition method. The sub-picogram plutonium sample was determined quantitatively by isotope dilution mass spectrometry (IDMS).展开更多
文摘There are six independent constituents with 4 chemical elements, i.e. PuH 2.7 (s), PuN(s), Pu 2O 3(s), N 2, O 2 and H 2, therefore , the system described involves of 2 independent reactions ,both ΔG°0. The calculated equilibrium compositions are in agreement with those of the experimental, which indicates that the chemical equilibrium is nearly completely approached. Therefore, it is believed that the reaction rate of plutonium hydride with air is extremely rapid. The present paper has briefly discussed the simultaneous reactions and its thermodynamic coupling effect.
文摘By using active carbon powder as ionization enhance matter, the detect sensitivity of 239Pu ,which was 0.5 pg (1±0.15, 95% confidence level), was about 20 times that of the tradition method. The sub-picogram plutonium sample was determined quantitatively by isotope dilution mass spectrometry (IDMS).
