电沉积法制备碲靶

采用电沉积法将Ｔｅ电沉积在以Ｎｉ为底衬的Ｃｕ靶托上，制备出了质子回旋加速器ＣＹＣＬＯＮＥ－３０用碲靶，用以生产放射性医用同位素＾１２３Ｉ。研究了电流密度、电沉积时间、温度、电沉积溶液中碲的质量浓度（以ＴｅＯ２计）、碱度等工艺条件对碲靶质量的影响。推荐最佳工艺条件为：电沉积液介质浓度ｃ（ＫＯＨ）＝１ｍｏｌ／ｌ；ρ（ＴｅＯ２）＝５５－６５ｍｇ／ｍｌ；电流密度Ｊ＝１０－１２ｍＡ／ｃｍ＾２；温度Ｔ＝１８－     

亚硝酸与正丁醛和Np（Ⅵ）反应的动力学研究

研究了（１）ＨＮＯ２与正丁醛的反应，得速率方程为：－ｄｃＨＮＯ２／ｄｔ－ｋ１ｃＨＮＯ２．ｃｎ－ｃ３Ｈ７ＣＨＯ．ｃＨＮＯ３，在２０℃、Ｉ＝２．０ｍｏｌ／ｋｇ时，速率常数Ｋ１＝０．７６ｌ＾２（ｍｏｌ＾２．ｍｉｎ）（２）在固定１．０ｍｏｌ／ｌＨＮＯ３条件下，ＨＮＯ２与Ｎｐ（Ⅵ）的反应，得速率方程为：－ｄｃＮｐ（Ⅵ）ＣＨＮＯ２在２０℃、Ｉ＝２．０ｍｏｌ／ｋｇ时，表观速率常数ｋ３＾１＝９３ｌ／ｍｏ     

硝酸溶液中U（Ⅳ）,U（Ⅵ）和Pu（Ⅲ）的二次微分光谱及其同时测定

研究了ＨＮＯ３介质中Ｕ（Ⅳ），Ｕ（Ⅵ）和Ｐｕ（Ⅲ）的微分光谱和吸收光谱，讨论了Ｈ＾＋，ＮＯ＾－３和ＨＮＯ３浓度变化对这三种离子二次微分光谱的影响，并在此基础上，对Ｕ、Ｐｕ浓度进行了测定。在硝酸介质中同时测定Ｕ（Ⅳ），Ｕ（Ⅵ）和Ｐｕ（Ⅲ）的适宜硝酸浓度范围为２．５－３．０ｍｏｌ／ｌ，相对偏差〈５．０％，对Ｕ（Ⅳ），Ｕ（Ⅵ）和Ｐｕ（Ⅲ）的检测下限分别为０．１、１和０．５ｍｍｏｌ／ｌ。     

^99mTc标记环己二酮二肟及其甲基硼酸加成物和初步动物实验

实验结果表明，＾９９ｍＴｃ－ＣＤＯ的标记率受体系的ｐＨ值影响较小，而＾９９ｍＴｃ－ＣＤＯ－ＭｅＢ只有在ｐＨ＝３．５－４．０时标记率才能大于９０％。小鼠体内分布实验表明，＾９９ｍＴｃ－ＣＤＯ－ＭｅＢ在动物心肌中较高的吸收，但随时间延长而迅速清除。心／肝比值在给药后１、５和１０ｍｉｎ时分别为３、１．５和０．８。＾９９ｍＴｃ－ＣＤＯ在心、脑中的浓聚明显低于９９ｍＴｃ－ＣＤＯ－ＭｅＢ。     

在NH4F介质中电沉积^233Pa源

介绍了在ＮＨ４Ｆ介质中制备薄而均匀的＾２３３Ｐａ镀层的实验方法。对＾２３３Ｐａ电沉积的主要影响因素（电流密度、搅拌速度、电镀时间和溶液的ｐＨ等）进行了实验，得到了在不锈钢片上电沉积厚度为１ｍｇ／ｃｍ＾２的＾２８３Ｐａ源。同时观察了用不同阴极材料对电沉积＾２３３Ｐａ源厚度及电沉积效率的影响，提出了在不锈钢片上制备＾２３３Ｐａ源的工艺流程。     

乙酰二茂铁缩4—苯氨基硫脲与UO^2＋2,Hg^2＋,Ni^2＋,Zn^2＋,的…

乙酰二茂铁缩４－苯氨基硫脲（Ｃ１９Ｈ１９Ｎ３ＳＦｅ）与某些金属离子在无水乙醇中反应得到了希夫碱配合物Ｍ．Ｌ．Ｘ２．ｎＨ２Ｏ（Ｍ为ＵＯ＾２＋２，Ｈｇ＾２＋，Ｎｉ＾２＋，Ｚｎ＾２＋，Ｌ为Ｃ１９Ｈ１９Ｎ３ＳＦｅ；ＮＯ＾－３，Ｃｌ＾－，１／２ＳＯ＾２－４；ｎ＝０－６）并对配合物的组成及某些物理化学质进行了测试和表征。     

酰胺荚醚对Tc(Ⅶ)的萃取行为研究

研究了３种荚醚Ｎ，Ｎ，Ｎ’Ｎ’－四丁基－３－氧－戊二酰胺（ＴＢＯＰＤＡ）、Ｎ，Ｎ，Ｎ’Ｎ’－四异丁基－３－氧－戊二酰胺（ＴｉＢＯＰＤＡ）和Ｎ，Ｎ，Ｎ’Ｎ’－四丁基－３，６－二氧－辛二酰胺（ＴＢＤＯＯＤＡ）在ＨＮＯ３介质中对ＴｃＯ＾－４的萃取行为，稀释剂为４０％辛醇－煤油。萃取过程为一放热反应。萃取反应式为Ｈ＾＋＋ＴｃＯ＾－４＋ｎＳ＝ＨＴｃＯ４．ｉＳ（式中Ｓ表示萃取剂）。在酸度为０．５、２．０、４．     

萃取液闪法测定尿中^239,240Pu

从２４ｈ尿中取样７５０ｍｌ，加入ＨＮＯ３－Ｈ２Ｏ２，以湿式灰化去除有机物。在０．５－１．０ｍｏｌ／ｌ ＨＮＯ３介质中，用３０％ＴＲＰＯ－二甲苯萃取＾２３８，２４０Ｐｕ等α核素。在Ｈ２Ｏ２作用下，Ｎｐ为Ｎｐ（Ｖ），其萃取分配比极低；Ａｍ（Ⅲ）等核素被萃取，用５．５ｍｏｌ／ｌＨＮＯ３洗涤去除。以０．０１ｍｏｌ／ｌ ＨＮＯ３洗涤有机相，去除绝大部分被萃ＨＮＯ３后，加入Ｕｌｔｉｍａ Ｇｏｌｄ Ｆ闪烁液，于     

^188Re—HEDP的制备和初步动物实验

用＾１８８Ｗ／＾１８８Ｒｅ发生器淋洗液制备了骨肿瘤治疗＾１８８Ｒｅ－ＨＥＤＰ，＾１８８Ｒｅ－ＨＥＤＰ的最佳标记条件为：５ｍｇＨＥＤＰ，２．０ｍｇＳｎＣｌ２和１ｍｇＶｃ，在ｐＨ２．０的条件下，标记率大于９５％，其体外１２ｈ内稳定性良好，在制备＾１８８Ｒｅ－ＨＥＤＰ时加入辅剂，注射后４ｈ，小鼠股骨摄取为（７．８６±１．６２）％ＩＤ／ｇ，而对照组仅为（１．９２±０．６１）％ＩＤ／ｇ（Ｐ〈０．０１），兔全     

高注量快中子辐照在α—Al2O3中产生空洞的正电子湮没研究

采用正电子湮没技术研究３×１０＾２０／ｃｍ＾２中子注量，Ｅｎ≥１ＭｅＶ快中子辐照在α－Ａｌ２Ｏ３中产生的辐照效应，实验发现α－Ａｌ２Ｏ３在辐照后的８５０℃退火形成尺寸约为０．７ｎｍ的空洞。     

Identification of radiation treatment of wheat （Triticum aestivum. L）and rice （Oryza sativa. L） samples using thermoluminescence of contaminating minerals

Food irradiation is gaining popularity worldwide and this technology is important to improve quality and reduce the post harvest losses of food. Because of the rapid commercialization of irradiated foods throughout the world, compliance of different regulations relating to use of technology in different countries and demand of consumers for clear labelling of irradiated foods, there is need for the development of analytical methods to detect radiation treatment of food. Among several methods studied so far, thermoluminescence （TL） is an important method that can be used to find out the irradiation history of food that contain even a very minute amount of dust particles. In this study, the irradiated and unirradiated wheat and rice samples were analyzed using the TL method. The samples were purchased from the local market of Peshawar and irradiated to radiation doses of 0.5 and 1.0 kGy using Co-60 gamma irradiator at the Nuclear Institute for Food and Agriculture （NIFA）, Peshawar. The mineral contaminants were isolated by jet water, ultrasonic treatment, and density gradient. TL glow curves of the isolated minerals from irradiated and unirradiated samples were recorded between the temperature ranges of 50-500℃ using a TL reader. Generally, the glow curves for irradiated samples showed much higher TL intensities （TL1） than the unirradiated samples. The results were normalized by rerradiation of mineral samples to gamma-ray dose of 1.0 kGy followed by determination of the second glow curves （TL2）. The ratio of the area of first glow curve to that of second glow curve （TL1/TL2） was calculated for selected temperature intervals and compared with the recommended values for unirradiated and irradiated samples. Finally, the shapes of the glow curves for irradiated and unirradiated samples were also analyzed. On the basis of these results （comparison of TL-intensities, TL1/TL2 ratios and shapes of the glow curves）, all the irradiated and unirradiated samples of wheat and rice were unequivocally identified.     

Preparation of Zn/TiO2 powder and its photocatalytic performance for oxidation of P-nitrophenol

Zn-doped TiO2 catalysts were prepared using a sol-gel method and characterized by XPS,UV-Vis, BET, XRD in this study. Under the irradiation of simulant sunlight, the photocatalytic activity for the degradation of p-nitrophenol was studied too. After irradiation for 2.5 h, the degradation percentage of p-nitrophenol could rise to more than 80 %. The results showed that the spectrum absorption band edge of Zn/TiO2 powder does not broaden obviously comparing with pure TiO2 powder. Zinc exists as Zn （11）. When calcined at 973 K, there is a new phase as ZnTiO3 in Zn/TiO2 catalyst. The order of photocatalytic activity of Zn/TiO2 catalysts calcined at different temperatures for p-nitrophenol is 773 K 〉 673 K 〉 873 K 〉 573 K 〉 973 K and the photocatalytic activity of Zn/TiO2 catalyst calcined at 773 K is better than TiO2 catalysts heated at the same temperature, and outclasses that of commercial TiO2 catalyst. It also showed that the photocatalytic degradation of p-nitrophenol follows first-order kinetics under the irradiation of simulant sunlight.     

Current status of radiation therapy for prostate cancer

Radiotherapy for the treatment of prostate cancer has been extensively explored in the past. Along with the comprehensive understanding of the biology of prostate cancer and rapid advances in terms of technology, the out- come of treatment for the patients with prostate cancer has improved. The authors review radiotherapy as the primary treatment for the disease, with particular emphasis on the technological advances from both the radiobiological and radiophysics aspects. Nonconventional fractionated irradiation like hyper- or hypo-fractionation has been imple- mented in the clinic, the final results still need to be confirmed in the future. Technological advances like IMRT, IGRT, in the last two decades have significantly improved the delivery of external radiotherapy to the prostate. This has re- sulted in an overall increase in the total dose that can be safely delivered to the prostate, which has led to modest im- provements in the biochemical outcome. However, establishing the standard therapy for prostate cancer remains con- troversial. It is hoped that the next decades will bring continued advances in the development of biologicals that will further improve current clinical outcomes.     

The control system for SSRF injection and extraction

This paper introduces the injection and extraction control system design for SSRF,which is a distributed control system aimed at stability and reliability of the pulse power supplies,PPS(Personnel Protection System)and MPS(Machine Protection System).The hardware environment is mainly based on PLC(Programmable Logic Con- troller),and ARM(Advanced RISC Machine)is also applied for studying stability of the power supplies.WinCC and EPICS(Experimental Physics and Industrial Control System)have been selected as the platforms of SCADA(Super- visory Control and Data Acquisition).For unifying the interfacing to the control computer,all front-end equipments are connected via Industrial Ethemet.     

水平管内含空气蒸汽强制对流冷凝换热模型研究

为研究含空气蒸汽在水平管内强制对流冷凝换热特性,基于对传热传质过程的分析,建立了管内为环状流与波状流条件下的流动冷凝换热模型。从潜热、显热和液膜3个环节对整个换热过程进行建模,最终得到计算局部冷凝换热系数的理论关系式。模型预测结果与实验数据的对比表明,二者相对偏差在±20%以内,验证了该换热模型的准确性与适用性。通过进一步的研究发现：从换热管入口至出口,随着冷凝的进行,管内换热主要热阻由液膜热阻向气液界面的凝结热阻转变;主流气体对流换热过程基本可忽略。     

The preclinical pharmacological study of dopamine transporter imaging agent 18F-FP-β-CIT

The paper is to study pharmacologic characteristics of 18F-FP-β-CIT (18F-N-(3-fluoropropyl)-2β- carbomethoxy-3β- (4-iodophenyl)nortropane) as an imaging agent for dopamine transporter. The radiochemical purity of 18F-FP-β-CIT in aqueous solution was over 95% after standing at room temperature for 4h. Biodistribution displayed rapid uptake in rat brain (1.375 %ID/organ at 5min and 0.100 %ID/organ at 180 min) and the striatal uptake was 1.444,0.731, 0.397, 0.230 and 0.146 %ID/g at 5, 30, 60, 120 and 180 min, respectively. The values of striatum/cerebellum,striatum/frontal cortex and striatum / hippocampus in rat's brain at 30 min were 3.38, 2.17 and 2.40 respectively. The uptake in striatum can be blocked by β-CFT, suggesting that 18F-FP-β-CIT binds to DAT peculiarly. The compound was rapidly cleared from monkey's blood. The striatal uptake was bilaterally decreased in the left-sided lesioned PD rats, compared with normal control. Brain PET imaging studies in normal monkey showed that 18F-FP-β-CIT was concentrated in striatum. The test of undue toxicity showed that the dose received by mice was 1250 times as by human, which indicates that 18F-FP-β-CIT is very safe. So 18F-FP-β-CIT is a promising PET imaging agent for DAT with safety and validity.     

Web Services interface of SSRF archive data analysis system

Accelerator database stores various static parameters and real-time data of accelerator. SSRF (Shanghai Synchrotron Radiation Facility) adopts relational database to save the data. We developed a data retrieval system based on XML Web Services for accessing the archive data. It includes a bottom layer interface and an interface applicable for accelerator physics. Client samples exemplifying how to consume the interface are given. The users can browse, retrieve and plot data by the client samples. Also, we give a method to test its stability. The test result and performance are described.     

Investigations on landmine detection by BF3 detector

Experiments were carried out to investigate the possible use of neutron backscattering for the detection of polyethylene (PE) sample buried in the soil. In detection of landmine by neutrons, the neutron detector and its shield play an important role. In this paper, the effects of graphite, heavy water, polyethylene and boric acid moderators on the flux of back scattered neutrons were investigated. We have also experimentally verified the effect of BF3 detector shield and obtained good agreement with theory.     

PLASMA SCIENCE AND TECHNOLOGY AUTHOR INDEX TO VOLUME 16(2014)

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Radioactivity levels in soil of salt field area,Kelambakkam,Tamilnadu,India

Soil samples in and around salt field area have been analyzed for natural radioactivity concentration using gamma ray spectrometer.The activity concentration for ~(232)Th,~(238)U and ~(40)K are ranged from 27.88 to 45.27 Bq/kg, from BDL to 13.30 Bq/kg,and from 135.54 to 381.28 Bq/kg,respectively.The measured activity concentrations for these radionuclides were compared with world average activity of soil.The average activity concentration of ~(232)Th in the present study is 1.19 times higher than world median value while the activity of ~(238)U and ~(40)K is found to be lower. The absorbed dose rates due to these radionuclides were calculated.The average absorbed gamma dose rate due to the presence of ~(232)Th,~(238)U and ~(40)K in soil samples is 36.99 nGy·h~(-1).These results indicate no radiological anomaly. The data presented in this study will serve as a base line survey for primordial radionuclides concentration in the study area.