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radiochemical separation
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  放射化学分离
     (EC+β~+) decay study of ~(130)Ce and it's radiochemical separation
     ~(130)Ce(EC+β~+)衰变研究及其放射化学分离
短句来源
     The ̄(229)Ra has been produced in the ̄(232)Th (n,α) ̄(229)Ra reaction by 14 Mev neutron irradiation of natural Thorium. The ̄(229)Ra activities were separated from irradiated target material by radiochemical separation technique.
     用14MeV中子轰击钍靶,通过 ̄(232)Th(n,α) ̄(229)Ra反应产生 ̄(229)Ra,由放射化学分离技术从被照靶物质中分离出 ̄(229)Ra活性;
短句来源
     ISOTOPIC ACTIVATION DETERMINATION OF Os-184/Os-190 WITH CARRIER-FREE RADIOCHEMICAL SEPARATION
     用无同位素载体放射化学分离活化分析法测定~(184)Os/~(190)Os 比值
短句来源
     The radiochemical separation was performed to isolate the hafnium from tungsten and the complex mixture of the reaction products. The activity of the hafnium was measured using a HPGe detector The new neutron-rich isotope 186Hf has been identified for the first time by measuring the growth and decay of the 737.5keV - ray from its daughter 186Ta. The half-life of186Hf was determined to be (2.6±1.2) min.
     使用放射化学分离技术从钨和反应产物混和物中分离出铪,并由HPGe探测器测量铪样品的活性.观测到了186Hf的子体186Ta的737,5keVY射线的增长、衰变行为,结果表明,本实验首次合成并鉴别了新丰中子同位素186Hf,测得它的半衰期为(2.6±1.2)min。
短句来源
     The radiochemical separation of the 111In was carried out with the HDEHP solvent extraction from the irradiated electroplating silver target.
     在辐照后的镀银靶中,用HDEHP溶剂萃取完成~(111)In的放射化学分离
短句来源
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  放化分离
     13 elements including La, Ce, Nd, Sm, Gd, Eu, Tb, Ho, Tm, Yb, Lu, Zn and Cs have been determined by radiochemical separation.
     用放化分离法测定了La,Ce,Nd,Sm,Eu,Gd,Tb,Ho,Yb,Tm,Lu,Zn和Cs等13个元素。
短句来源
     Radiochemical separation of thorium from the natural uranium irradiated by 60MeV/u ~(18)O ions
     60MeV/u~(18)O离子同天然铀反应钍的放化分离
短句来源
     Radiochemical Separation of ~(132)I From Mixed Fission Products
     从混合裂变产物中放化分离~(132)I
短句来源
     Sources of ~(235)Th were prepared by 14MeV neutron irradiation of Uranium and radiochemical separation. The β-spectra and γ-spectra were measured. The endpoint energy for ~(235)Th β-decay was obtained to be 1.44±0.04 MeV. Thus Q_β of ~(235)Th was determined to be 1.47±0.07 MeV.
     用14MeV中子照射铀并借助于放化分离产生了~(235)Th源,测得了β谱和γ谱,获得了~(235)Th的β端点能量为1.44±0.04MeV,从而确定了其Q_β=1.47±0.07MeV.
短句来源
     RADIOCHEMICAL SEPARATION AND INDENTIFICATION IN THE DETERMINATION OF 235 Th β DECAY ENDPOINT ENERGY
     ~(235)Th β 衰变端点能量测定中的放化分离
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  “radiochemical separation”译为未确定词的双语例句
     Radiochemical Separation and Purification in Study of (EC+β ̄+) Decay of  ̄(130)Ce
     Radiochemical Separation and Purification in Study of (EC+β~+) Decay of ~(130)Ce
短句来源
     Radiochemical Separation in Study of (EC+β ̄+) Decay of  ̄(128)Ce and  ̄(129)Ce
     Radiochemical Separation in Study of(EC+β~+) Decay of ~(128)Ce and ~(129)Ce
短句来源
     This is a review of the selection of nuclear reactions, preparation of targets, heatevolved in irradiation, yield of thick target, and radiochemical separation in thepreparation of radionuclides ~(56)Co, ~(57)Co, ~(88)Y, ~(109)Cd and ~(208)Po produced by 1.2 mand 1.5 m cyclotrons in Beijing, Shanghai and Lanzhou
     以在北京、上海和兰州的1.2 m和1.5 m迴旋加速器上研制~(56)Co、~(57)Co、~(88)Y、~(109)Cd和~(208)Po等放射性核素为例,综合研究了加速器制备放射性核素的有关核反应选择、靶子制备、辐照发热、厚靶产额及化学分离等几个问题。
短句来源
     The radiochemical separation and X-γ coincidence methods (element separation method) are introduced.
     介绍了化学分离和X-γ符合方法(元素分离方法);
短句来源
     The radiochemical separation of 111In from the irradiated target is carried out by HDEHP solvent extraction.
     用HDEHP溶剂萃取法从辐照后的银靶物质中分离出~(111)In,制备成~(111)InCl_3注射液制剂,并完成理化指标的测定。
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  radiochemical separation
The results were compared to the data obtained using radiochemical separation.
      
Petersburg using an advanced procedure involving radiochemical separation stage followed by the α-ray spectrometric and mass spectrometric determination.
      
A radiochemical separation method was applied to four parts of the stack.
      
Sources of185Hf prepared by 14-MeV neutron irradiation of tungsten followed by radiochemical separation have been studied.
      
Sources of237Th prepared by 14-MeV neutron irradiation of uranium followed by radiochemical separation have been studied.
      
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The production of carrier-free gallium-67 at external target of the 1.2M cyclotron is described. It was produced by bombardment of natural copper with 26.8 MeV a and natural zinc with 13.4 MeV deuterium, gave thick-target yields of 165μCi/μAh and 350μCi/μAh, respectively. Radiochemical separation of carrier-free gallium-67 from target was carried out by isopropyl ether extraction. Gallium-67 citrate injection was prepared by sodium citrate leaching. The overall chemical procedure took 4 hours and the operations...

The production of carrier-free gallium-67 at external target of the 1.2M cyclotron is described. It was produced by bombardment of natural copper with 26.8 MeV a and natural zinc with 13.4 MeV deuterium, gave thick-target yields of 165μCi/μAh and 350μCi/μAh, respectively. Radiochemical separation of carrier-free gallium-67 from target was carried out by isopropyl ether extraction. Gallium-67 citrate injection was prepared by sodium citrate leaching. The overall chemical procedure took 4 hours and the operations were simple and safe. The chemical yield was greater than 90%.

本文叙述了在1.2米回旋加速器的外靶上,用26.8MeV的α粒子束和13.4MeV的d粒子束,分别轰击天然铜靶和天然锌靶,制备无载体~(67)Ga的方法。其厚靶产额分别为165μCi/μAh和350μCi/μAh。无载体~(67)Ga的化学分离采用异丙醚溶剂萃取法。枸橼酸镓(~(67)Ga)注射液的制备采用3~3.8%枸橼酸钠溶液浸取。整个工艺流程需时4小时,操作简便,安全可靠,其化学产率可达90%以上。

By means of instrumental and radiochemical methods, 36 elements are determined in an Apollo-17 lunar mare basalt sample. Total amount of the sample is only 62.10 mg. By using instrumental neutron activation analysis, 19 elements (Al, V, Ti, Ca, Dy, Mo, Eu, Na, Sm, La, Ho, Lu, Yb, Tb, Hf, Cr, Fe, Co, and Sc) are determined for one part of the sample (20.00mg). The other part of the sample (42.10 mg) is irradiated at a thermal flux of 2×1013 n/cm2. s for 40 h. After 12 h cooling, radiochemical separation...

By means of instrumental and radiochemical methods, 36 elements are determined in an Apollo-17 lunar mare basalt sample. Total amount of the sample is only 62.10 mg. By using instrumental neutron activation analysis, 19 elements (Al, V, Ti, Ca, Dy, Mo, Eu, Na, Sm, La, Ho, Lu, Yb, Tb, Hf, Cr, Fe, Co, and Sc) are determined for one part of the sample (20.00mg). The other part of the sample (42.10 mg) is irradiated at a thermal flux of 2×1013 n/cm2. s for 40 h. After 12 h cooling, radiochemical separation is preformed and 17 more elements (Pr, Er, Gd, Nd, Ce, Tm, Cs, Rb, Sb, Zn, Zr, Sr, Ba, Ga, Ta, U and Th) are determined. The separation procedure consist of ion exchange, solvent extraction and reverse phase chromatography, resulting in the separation of 36 elements into 12 groups. A CANBERRA SCORPIO-3000 system is used for γ-ray spectrum measurements and data processing. The system includes a Ge (Li) detector with an energetic resolution of 1.9 keV and a relative efficiency of 30% and a computerized data acquisition and reduction system. For each element determined, two or more comparative standards are independently prepared to ensure the reliability of the standards. Accuracy of the results is verified by parallel analysis of USGS SRM W-1 sample. Most of the experimental results including ' 14 rare earth elements agree quite well with those reported in the literature for Apollo-17 lunar mare basalt samples.

本文利用仪器和放射化学组分离的方法,在62.10mg Apollo-17月海玄武岩样品中,测定了36种元素的含量。仪器中子活化分析共测定了Al,V,Ti,Ca,Dy,Mn,Eu。Na,Sm,La,Ho,Lu,Yb,Tb,Hf,Cr,Fe,Co,Sc等19种元素。用42.10mg样品,在堆中子通量为2×10~(13)n/cm~2·s处辐照40h。冷却12h后,用混合酸溶解样品,通过HAP-717树脂组成的串联柱,再用TTA和铜铁试剂—氯仿萃取,最后通过50%和10%的HDEHP萃取色谱柱,将36种元素分成12组,又测定了Pr,Er,Gd,Nd,Ce,Tm,Cs,Rb,Sb,Zn,Zr,Sr,Ba,Ga、Ta,U和Th等17种元素。γ能谱的测量和数据处理是在具有高效率(30%)、高分辨率(1.9keV)Ge(Li)探测器的SCORPIO—3000系统上进行的。我们的测定结果,对主量和微量元素,尤其是镧系元素的含量与报道的Apollo—17月海玄武岩数值范围相符合。

The paper describes simultaneous determination of trace quantities of B,C and N in semiconductor silicon by nuclear reaction of 10B(d, n) 11C(T1/2=20.3min), 11B(d, 2n) 11C, 12C(d,n) 13N(T1/2 = 9.96min) and 14N(d, n) 15O(T1/2=2.03mm) with deutrons from a 1.2m cyclotron in our institute. An inert-gas fusion technique is adopted for rapid radiochemical separation after irradiation of the samples. 11C, 13N and 15O are absorbed in ascarite 5A molecular sieve cooled in liquid nitrogen and Hopcalite reagent at...

The paper describes simultaneous determination of trace quantities of B,C and N in semiconductor silicon by nuclear reaction of 10B(d, n) 11C(T1/2=20.3min), 11B(d, 2n) 11C, 12C(d,n) 13N(T1/2 = 9.96min) and 14N(d, n) 15O(T1/2=2.03mm) with deutrons from a 1.2m cyclotron in our institute. An inert-gas fusion technique is adopted for rapid radiochemical separation after irradiation of the samples. 11C, 13N and 15O are absorbed in ascarite 5A molecular sieve cooled in liquid nitrogen and Hopcalite reagent at a temperature of 650℃ respectively. Positron annihilation events of each produced nucleus are counted by a γ-γ coincidence measuring system. B, C and N contents of about several ten parts per billion in silicon are then calculated simultaneously by a relatively quantitative method. Relative standard deviation for C, B and N are less than±50%,±20% and±50% respectively.This method is simple, rapid and sensitive for estimating light element content in silicon material.

本文叙述用本所1.2米回旋加速器产生的氘子,利用~(10)B(d,n)~(11)C,~(11)B(d,2n)~(11)C,~(12)C(d,n)~(13)N和~(14)N(d,n)~(15)O核反应,同时测定半导体硅中痕量的硼、碳和氮。样品辐照后,采用惰性气体熔融法作快速放化分离,~(11)C、~(13)N和~(15)O分别吸收在烧碱石棉、液氮冷却的5A分子筛和650℃的Hopcalite试剂上,用γ-γ符合测量装置测量各产核的湮灭γ计数,用相对定量法可同时得到硅中约几十ppb的硼、碳、氮含量。相对标准偏差分别为:C<±50%,B<±20%,N<±50%。 方法简单、快速且灵敏度高,是鉴定硅材料中轻元素含量的一个好方法。

 
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