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radiochemical determination
相关语句
  放射化学测定方法
     RADIOCHEMICAL DETERMINATION OF 54 Mn IN WATER
     水中54Mn的放射化学测定方法
短句来源
  “radiochemical determination”译为未确定词的双语例句
     RADIOCHEMICAL DETERMINATION OF BURNUP OF NUCLEAR FUEL WITH ~(137)Cs AS MONITOR
     用~(137)Cs为监测体的放化法测定核燃料的燃耗
短句来源
     The mass distribution in the spontaneous fission of ~(252)Cf was investigated bythe radiochemical determination of the absolute fission yield for 35 mass chains.
     本文用放化法测定~(252)Cf自发裂变产物35个质量链的绝对产额。
短句来源
     RADIOCHEMICAL DETERMINATION FOR CHOLINESTERASE
     胆碱酯酶的放射化学测定法
短句来源
     A radiochemical determination procedure has been setup for measuring radioactivity of 54Mn in the water.
     提出了水中锰-54的放化分析测定方法。
短句来源
  相似匹配句对
     RADIOCHEMICAL DETERMINATION FOR CHOLINESTERASE
     胆碱酯酶的放射化学测定法
短句来源
     Determination
     决心
短句来源
     Determination of DO
     水中溶解氧的测定
短句来源
     RADIOCHEMICAL DETERMINATION OF 54 Mn IN WATER
     水中54Mn的放射化学测定方法
短句来源
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  radiochemical determination
Comparing the method decribed and the standard radiochemical determination of plutonium isotopes for soil samples taken from a 5-km zone around the Chernobyl nuclear power plant showed that the results are in good agreement with one another.
      
Radiochemical determination of the absolute yields of fragments of the fission of Pu241 and Pu239 by slow neutrons
      
Radiochemical determination of the Al27(n, α)Na24 reaction cross section for a neutron energy of 14.6 Mev
      
We have developed a chemical separation technique that allows the radiochemical determination of the californium α-decay content in Department of Energy (DOE) high level wastes from the Hanford and Savannah River sites.
      
An oxidation-reduction step was introduced in the classical procedure of the radiochemical determination of transuranic elements in order to control the valence of the separated elements.
      
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The mass distribution in the spontaneous fission of ~(252)Cf was investigated bythe radiochemical determination of the absolute fission yield for 35 mass chains.An integration of the mass--yied curve gives a value of 199.4% which is in verygood agreement with the value of 200% in fission. The mean masses of the lightand heavy groups are located at 106.39 and 141.82 respectively. The averageneutron number per fission (?) is 3.79±0.12. The peak--to valley ratio is ≥370.The results obtained in this work is...

The mass distribution in the spontaneous fission of ~(252)Cf was investigated bythe radiochemical determination of the absolute fission yield for 35 mass chains.An integration of the mass--yied curve gives a value of 199.4% which is in verygood agreement with the value of 200% in fission. The mean masses of the lightand heavy groups are located at 106.39 and 141.82 respectively. The averageneutron number per fission (?) is 3.79±0.12. The peak--to valley ratio is ≥370.The results obtained in this work is compared with those in literature.

本文用放化法测定~(252)Cf自发裂变产物35个质量链的绝对产额。研究了~(252)Cf自发裂变产物的质量-产额分布曲线。其轻峰平均质量数为106.39±0.08;重峰为141.82±0.09;平均释放中子数v=3.79±0.12。轻、重峰高度1/10处的宽度分别为26.7和26.8个质量单位,峰谷比≥370。实验结果与文献作了比较。

A radiochemical determination procedure has been setup for measuring radioactivity of 54Mn in the water. The procedure is based on the following processes: (1) copre-cipitation of hydroxide of manganese and iron to concentrate radioactive manganese in the sample; (2) precipitation of MnO2 to purify manganese from other impurities; (3) cation exchange chromatography separation in hydrochloric acid-acetone mixture to separate and purify Mn2+ from impurity nuclides in the sample; (4) preparation of manganese...

A radiochemical determination procedure has been setup for measuring radioactivity of 54Mn in the water. The procedure is based on the following processes: (1) copre-cipitation of hydroxide of manganese and iron to concentrate radioactive manganese in the sample; (2) precipitation of MnO2 to purify manganese from other impurities; (3) cation exchange chromatography separation in hydrochloric acid-acetone mixture to separate and purify Mn2+ from impurity nuclides in the sample; (4) preparation of manganese ammonium phosphate precipitate. Finally the gamma radioactivity of 54Mn in the precipitate is counted by low background gamma spectrometer with a HP Ge detector. When 2. 03 Bq 54Mn and 9. 63 mg Mn2+ were added into 10 liters of water, the chemical and radiochemical recovery of the procedure were (76. 4 + 6. 1)% and (77. 1+5. 9)% respectively. The decontamination factors for nuclides of 60Co, 63Ni, 59Fe,65Zn, 51Cr, 137Cs, 90Sr, 95Zr, 106Ru-106Rh, 144Ce-144Pr are greater than 1X104. The minimun detectable concentration for 54Mn in water of the method is 4 X 10-3 Bq/L.

提出了水中锰-54的放化分析测定方法。该法基于水中的放射性锰和加入的锰(铁)载体以氢氧化锰(铁)共沉淀浓集、MnO_2沉淀纯化、盐酸-丙酮混合液中的阳离子交换色层法分离纯化Mn~(2+)以及MnNH_4PO_4·H_2O沉淀制源,最后用高纯锗-低本底γ谱仪测定锰-54的γ放射性活度。当10L水中加入2.03Bq~(54)Mn和9.63mg Mn~(2+)载体时,全程化学回收率和放化回收率分别为(76.4±6.1)%和(77.1±5.9)%。对~(60)Co,~(63)Ni,~(59)Fe,~(65)Zn,~(51)Cr,~(137)Cs,~(90)Sr,~(95)Zr,~(106)Ru-~(106)Rh~(144)Ce-~(144)Pr的去污系数均大于1×10~4。该法对水中~(54)Mn的探测下限为4×10~(-3)Bq·L~(-1)。

A radiochemical determination procedure has been established for measuring the radioactivity of 54 Mn in water. The procedure is based on the following processes: (1) coprecipitation of hydroxide of manganese and iron to concentrate radioactive manganese in the sample; (2) precipitation of MnO 2 to purify manganese from other impurities; (3) separation by cation exchange chromatography in hydrochloric acid acetone mixture to separate and purify Mn 2+ from impurity nuclides in the sample;...

A radiochemical determination procedure has been established for measuring the radioactivity of 54 Mn in water. The procedure is based on the following processes: (1) coprecipitation of hydroxide of manganese and iron to concentrate radioactive manganese in the sample; (2) precipitation of MnO 2 to purify manganese from other impurities; (3) separation by cation exchange chromatography in hydrochloric acid acetone mixture to separate and purify Mn 2+ from impurity nuclides in the sample; and (4) preparation of manganese ammonium phosphate precipitate. Finally, the gamma radioactivity of 54 Mn in the precipitate is counted by a low background gamma spectrometer with a HPGe detector. When 2.03 Bq of 54 Mn and 9.63 mg of Mn 2+ are added into 10 liters of water, the chemical and radiochemical recovery of the procedure are (76.4±6.1)% and (77.1±5.9)%, respectively. The decontamination factors for nuclides 60 Co, 63 Ni, 59 Fe, 65 Zn, 51 Cr, 137 Cs, 90 Sr, 95 Zr, 106 Ru 106 Rh, and 144 Ce 144 Pr are greater than 1×10 4. The minimum deter minable concentration for 54 Mn in water is 4×10 -3 Bq·l -1 。

基于水中的放射性Mn和加入Mn(Fe)载体以Mn(OH)2(Fe)共沉淀浓集,采用MnO2沉淀纯化、盐酸-丙酮混合液中的阳离子交换色层法分离纯化Mn2+以及MnNH4PO4·H2O沉淀制源,最后用高纯锗-低本底γ谱仪测定54Mnγ放射性活度。当10l水中加入2.03Bq54Mn和9.63mgMn2+载体时,全程化学回收率和放化回收率分别为(76.4±6.1)%和(77.1±5.9)%。对60Co、63Ni、59Fe、65Zn、51Cr、137Cs、90Sr、95Zr、106Ru-106Rh、144Ce-144Pr的去污系数均大于1×104。本法对水中54Mn的探测下限为4×10-3Bq·l-1。

 
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