最新刊期
      卷 0 ， 期 0 ， 2020
      • Junchen Liu
        Vol. 08, Issue 1, (1985)
        关键词：60Co γ;radiation;n-paraffin sulfoxidation   
        9
        |
        16
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323926 false
        发布时间：2022-08-16
      • Chengfu Shen,Jinghua Qian,Yurong Zhang,Weilong Wang,Xiaofeng Wu,Agen Zhang,Longxing Zhang,Dehong Zang
        Vol. 08, Issue 1, (1985)
        摘要：Elastic recoil detection (ERD) method has been used to analyze the total amount of H in the adsorbent of dimethyl benzene. Atomic ratio of a Mylar film with known H amount is determined at first and the result is in agreement with the expectant values. Then, using a kapton film as a standard sample, we measured the total amount of H in the adsorbents manufactured under the different technical conditions. The results obtained might be helpful to practical usage.  
        关键词：Adsorbent;analysis of total amount of hydrogen;ERD (elastic recoil detection)   
        9
        |
        17
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323949 false
        发布时间：2022-08-16
      • Xigang Lin,Peilu Wang,Jingyun Jiang,Yuanru Chen,Wei Gao,Libo Yang
        Vol. 08, Issue 1, (1985)
        摘要：The influence of ion beam bombardment-diffused coatings on corrosion resistance of 20* and 2Cr13 steels in the seawater has been studied. The corrosion tests which were made by submerging the steels in the artificial seawater and the determination of the electrochemical behaviour show that the corrosion resistance of the intermixed thin 2Cr13+ Cr+Ni layer is similar to that of the thin lCr18Ni9Ti surface layer. The results of tests have been discussed.  
        关键词：ion beam;bombardment;steel;corrosion   
        8
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323948 false
        发布时间：2022-08-16
      • Yuqing Peng,Wanhui Zheng,Yiping Zhang,Shenghua Li
        Vol. 08, Issue 1, (1985)
        摘要：The color centers in irradiated LiF are investigated by absorption spectrum and positron annihilation. The samples are pure LiF single crystal, which are irradiated with γ-ray of 60Co at room temperature. When the dose varies in the range 1×105 rad—1.3×108 rad, the F, F2,F2+, F3, F4, R, and R' color centers appear in the LiF crystal. The F2- is not observed because it is limited by wavelenth range of used spectrometer. At irradiation dose lesser then 1 × 106 rad, we obtained that the concentration of F-center and the relative change in S-parameter are a linear function of the spuare root of the irradiation dose. However, at the dose larger then 1×106 rad, the change of the S-parameter is proportional to the logarithm of irradiation dose due to the appearance of F aggregate centers.  
        关键词：LiF single crystal;irradiation color center;absorption spectrum;positron annihilation   
        9
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323941 false
        发布时间：2022-08-16
      • Yusheng Xu,M. Ghafari,H. P. Klein,U. Gonser
        Vol. 08, Issue 1, (1985)
        摘要：The influence of metalloid atoms on the average hyperfine field were determined from Mössbauer spectra of amorphous alloys Co74.5 B25-x Mx (M=Ge. Si. C) and DSC measurements. A discussion about the dependence of Curie temperature of Co-based and Fe-based amorphous alloys on the metalloid atoms is given. We have observed the crystallization processes in amorphous specimens through DSC. The Mössbauer spectra for crystalline phase were fitted by means of Le Caer program. The hyperfine field distribution are explained in terms of number of nearest neighbor metalloid atoms.  
        关键词：Co-based amorphous alloys;Mössbauer spectrometer;differential scanning calorimeter   
        9
        |
        13
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323947 false
        发布时间：2022-08-16
      • Liren Jiang,Jinxin Lin,Yuzheng Wang,Lianxue Gu
        Vol. 08, Issue 1, (1985)
        摘要：This paper introduces a kind of microcomputer-based intelligent counting system andits supervision program. It adopts the transmision mode of software and hardware combination. The interface circuit needs only a few devices, and a good resolution time can be obtained. The supervision program makes the instrument possessing some editing capability, carrying out the data acquisition under the pretime or preerror mode, displaying the data acquired and printing out the results. This kind of intelligent counter possesses the capability of on-line data processing, its ratio of performance to price is much better than ordinary scaler.  
        关键词：nuclear counter microcomputer-based;interface;supervision program;intelligence   
        8
        |
        16
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323984 false
        发布时间：2022-08-16
      • Quanxun Song
        Vol. 08, Issue 1, (1985)
        摘要：This paper describes a measurement device for determination of the uranium content by delayed neutron counting. The advantages of this device are as follows: (1) high sensitivity, the detections limit for natural uranium and 235U is 0.05 ppm and 0.4 ppb respectively, (2) no blank error, γ balance problem and other interferences. (3) high accuracy, for 1 ppm natural uranium, the error of the determination is less than 4.3%. (4) simplicity, the analyzing time for one measurement is three minutes. (5) It can automatically analyse large amount of samples and immediately give its results. (6) samples are nondestructive. It can determine ten to twenty thousand samples per year. This equipment is suitable for determination of large amount of geological explorative samples.  
        关键词：delayed neutron counting;pneumatic transmission device;Uranium   
        8
        |
        13
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28323985 false
        发布时间：2022-08-16
      • Xiaofeng Zao,Jihe Gu
        Vol. 08, Issue 1, (1985)
        摘要：The formulations for the calculation of focussing parameters of the three iron barmagnetic focussing channel are derived in this paper. The calculation results are consistent with the measurement.  
        关键词：magnetic focussing channel;calculating formulations of three iron   
        9
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324002 false
        发布时间：2022-08-16
      • Ruiying Yang,Zhongxiang Huang
        Vol. 08, Issue 1, (1985)
        摘要：It has been shown that the instrumental neutron activation analysis can be used todetermine 20 elements in geological samples. Precision and accuracy of the INAA method have been evaluated by USGS and NBS standard reference materials. The errors in precision and the accuracy are less than 15%.The abundance of REE elements has been determined in representive samples from the Rikezhe ophiolite complex. The result indicates that the ophiolitic lavas are geochemically similar to the mid-ocean ridge tholeiites, and they are possibly volcanic eruptive products during the process of the Tethyan mid-ocean ridge spreading.  
        关键词：neutron activation;Trace element;ophiolite;metamorphic peridotites;ultramafic-mafic cumulate;dikes;pillow lavas;intercalated beds of lava   
        8
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324024 false
        发布时间：2022-08-16
      • Yanqing Zhao,Xiangdong Zhang
        Vol. 08, Issue 1, (1985)
        摘要：The multielement contents of boys' hair in "Ke-Shan" disease region and nondisease region are determined by means of the instrument neutron activation analysis method with long and short term irradiation. The domestic usual cleaning method for hair was compared with IAEA standard method. The partial standards used in our experiment are checked with NBS standard reference material and the results are satisfactory. The contents of 27 elements in 48 hair samples are determined and the preliminary rule of the distribution of some elements in human hair are obtained.  
        关键词：Neutron activation analysis;Trace elements;Human hair   
        8
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324023 false
        发布时间：2022-08-16
      • Qiren Zhao,Han Lin
        Vol. 08, Issue 1, (1985)
        摘要：In this paper an improved method for counting the radioactivity of Na214CO3 by liquid scintillation technique is reported. Na214CO3 solution was added into toluene/Triton X-100 scintillator which was mixed with CO2 trapping agent, DL-α-phenylethylamine. The radioaetivity of Na214CO3 was measured for nine days with no observed radioactivity loss. The radioactivity recovery was about 96—102% and the counting efficiency was about 83%.  
        关键词：liquid scintillation technique;method of sample chennel ratio;14C-Na2CO3;14C-NaHCO3;Sample preparation   
        9
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324040 false
        发布时间：2022-08-16
      • Department of the Modern Physics, University of Science and Technology of China,Anhui Chuxian Radio Factory,Anhui People's Hospital
        Vol. 08, Issue 1, (1985)
        摘要：A γ-activity meter which is able to measure a great variety of nuclides and a broad range of activity was presented. Its operation principle, the technical targets, the character of the circuit and the settlements of some physical problems were discussed.The operation of the instrument is very convenient with the printing automatically.  
        关键词：Activity;measure nuclide;printer   
        8
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324038 false
        发布时间：2022-08-16
      • Hong Zhang,Helin Dong,Baofen Zheng
        Vol. 08, Issue 1, (1985)
        摘要：The common methods and conditions of measuring Cerenkov radiation of 32P by liquid scintillation counters have been reported. The efficiency is higher in ethanol system than in water. By adding a little scintillation solution to ethanol system, the efficiency can be further raised; meantime the system remains basically unquenched by chemical substance. lf the wave length shifter is put into ethanol system instead of scintillation solution, the chemical substance can result in an apparent quenching. The quenching effect of colour in ethanol system containing scintillator is shown.  
        关键词：Cerenkov radiation;liquid scintillation measuring;wavelength shifter;quenching;quenching correction   
        8
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324085 false
        发布时间：2022-08-16
      • Xingen Yu,Yujian Ge
        Vol. 08, Issue 1, (1985)
        摘要：A hanging mercury drop electrode made of teflon capillary is described. The coefficient of variation in seven determinations of 0.05 ppm Pb solution is 2%. This electrode is suitable for ppb level trace elements analysis in many electrochemical researches, especially with radioactive and corrosive medium.  
        关键词：teflon hanging mercury drop electrode;radioactive corrosive medium   
        8
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324087 false
        发布时间：2022-08-16
      • Borong Bao,Yinsong Wang,Yanfei Li,Luona Chen
        Vol. 08, Issue 1, (1985)
        摘要：The absorption behaviours of 233Pa, 233U and Th on the silica gel, SnO2, Sb2O5 and MnO2 from HNO3 medium were studied. From batch experiments it shows that 233Pa was absorbed by the absorbents while 233U and Th are not absorbed. From column experiments silica gel and SnO2 appeared to be a good absorbents of 233Pa, 233U and Th. The SnO2,with its good physical and chemical properties would be a more effective reagent for isolation and parification of 233Pa.  
        关键词：233Pa;333U;Thorium;inorganic absorbents;Separation   
        8
        |
        16
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324104 false
        发布时间：2022-08-16
      • Weicheng Zhang,Zhongyang Wang,Aibao Song,Denggui Su
        Vol. 08, Issue 1, (1985)
        摘要：This paper describes a procedure for the separation of 57Co for Mössbauer source. The 57Co was obtained by 56Fe (d,n) 57Co reaction. The irradiated iron target is etched with 9N HC1 until essentially all the activity is transfered into solution 15% H2O2 is added to oxidize iron to ferric state. The solution is evaporated nearly to dryness. The resulting Fe (III) is dissolved in 4N HC1. Iron is extracted with Tributyl phosphate. The hydrochloric solution again evaporated nearly to dryness then it is dissolved in 9N HC1 and passed through a 717 ion exchanger column. 4N HC1 solution is choosed as eluant for 57Co. The recovery of 57Co is over 95%.  
        关键词：57Co;iron is extracted with TBP;cobalt is purified with ion change method   
        8
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324103 false
        发布时间：2022-08-16
      • Haiqiu Bao,Weiyu He
        Vol. 08, Issue 1, (1985)
        摘要：In order to detect the radioactive gas (carbon-11) in its cyclotron production process an ionization chamber of FG-1 type was designed. The advantages of the ionization chamber are simplicity of the structure, stability of the performance, convenience of the operation etc. Its total error of the measurement is about ±7%.  
        关键词：Carbon-11;on-line mornitoring   
        9
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324101 false
        发布时间：2022-08-16
      • Zhangxiong Tang,Jiangchao Hu,Yanqiao Wang,Zhenwen Di,Xiaomin Zhou,Liusheng Chen,Jinhuan Du
        Vol. 08, Issue 1, (1985)
        摘要：A polyester matrix thin radiochromic dye films are useful for measuring radiation absorbed doses in the ranges 104—107 rad. The increase in optical density versus energy deposited by radiation is linear over a wide range of doses, with dose rate playing no effects up to 4×103 rad/min, and gave same response to both 137Cs and 60Co gamma rays?  
        关键词：radiochromic dosimeter;leuco dye;nylon film;Radiation processing;Absorbed dose   
        8
        |
        15
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324181 false
        发布时间：2022-08-16
      • Xianfang Wen,Baozhong Wang,Dungyang Li,Xizhong Zhang,Yigu Yang,Liushen Jia,Zhiming Liu
        Vol. 08, Issue 1, (1985)
        摘要：It was indicated in this experiment that the yields of the rice after using of 5.5, 7.5, 9.5 and 11.5 kg. N/mu of (NH4) HCO3 were 138.9, 206.1, 220.6 and 270.6 kg/mu respectively. They are higher than control. There was no significant difference for yields of rice between the using of 9.5 and 11.5 kg/mu. It was shown in the pot experiment hat percent utilization of fertilizer was increased with nitrogen applied. By the same amount of nitrogen applied, phosphorous fertilizer abled to promote nitrogen uptaken and yield of rice. It was found that the N to P2O5 ratio of 19:9.5 was optimal for the Lutai Farm. There is no significant difference of yield of rice and percent utilization of fertilizer between (NH4) HCO3 and Ca (H2PO4) 2. The yield of rice is 10% higher for NH4HCO3 in whole ploughing layer base dressing than top dressing.  
        关键词：top application;Whole ploughing;layer base dressing;percent utilization of fertilizer   
        8
        |
        13
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324183 false
        发布时间：2022-08-16
      • Jixian Zhang,Shengguo Zhang,Chengmo Zhu
        Vol. 08, Issue 1, (1985)
        摘要：119 cases of thyroid uptake test and 70 cases of thyroid imaging using 123I were presented. Including euthyroid (49 cases) , hyperthyroidism (37 cases) , hyperthyroidism with clinical symptoms and sign but normal thyroid function test (7 cases) , simple goiter (21 cases) , and hypothyroidism (5 cases) . It was found that 123I uptake rate was very similar to 131I in all groups, except the 6th hour uptake rate in hyperthyroidism.In 70 cases of thyroid imaging, 27 cases were checked by operation or thyroid puncture, other 43 cases were assessed clinically and by ultrasonic examination. By dual isotopes application in same case, 123I and 131I thyroid imaging gives coincident results by both the scan and γ-camera. Nevertheless, 123I have more clear contour and satisfactory results than 131I. Therefore the advantages of 123I is conspicuous because it has short half life, small radiation dose and suitable for children and pregenant women uses. Besides, its γ ray energy is optimium for γ-camera imaging.  
        关键词：iodine-123;thyroid uptake test;thyroid imaging;scan;γ-camera   
        9
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324179 false
        发布时间：2022-08-16
      • Yaozhang Huang,Yongxin Wang,Wenjing Sun,Bingfa Zhu
        Vol. 08, Issue 1, (1985)
        摘要：This paper reported the use of 51Cr-K562 cells to determine NK activity. It was demonstrated that the target-cell K562 was better than the HeLa cells and 7405 hepa-carcinoma. The NK activity of 22 normal adults was 33.14±9.30% which is higher than that of 12 lung-cancer, 8 esophagocancer and 7 leukemia patients.  
        关键词：natural killer cell (NK);NK activity;target—cell;lymphecyte   
        9
        |
        16
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324182 false
        发布时间：2022-08-16
      • Nina Jiang,Qinglin Zhu,Yanging Xu
        Vol. 08, Issue 1, (1985)
        关键词：automatic quench compensation;curve fitting;standard quench curve;interactive calculation method;cubic polynomial;decay rate   
        8
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324180 false
        发布时间：2022-08-16
      • Zhanchu Ding
        Vol. 08, Issue 1, (1985)
        关键词：specific radioactivity of radioimmunoassay;tracer;self-displacement and equivalence point   
        9
        |
        14
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 28324196 false
        发布时间：2022-08-16
      0