Hydrogen Behavior in PdAg Alloy Studied by Time Differential Perturbed Angular Correlation

核数据是指描述和表征原子核这一物质层次的“数据”。它包括：有关原子核性质和由其相互作用支配的基本物理关系的“数据”；描述与原子核有关的基本物理过程，反映核物理基本规律的“数据”；以及对于核物理和核技术的发展及利用是极其关键（和／或重要）的“数据”。在核物理的发展历史中，不断地积累了大量的核数据。基于它们对于核物理及相关学科的基础研究的基本重要性，和在核能及核技术应用中的需要及发展趋势，提出了发展前沿性的核数据，建立《原子核的基础数据库（NBDB）》的计划。这里将介绍NBDB的进展及已提供共享的数据咨源。     

中国核技术应用产业发展现状

核技术应用作为高技术产业逐渐受到政府重视,并于“十三五”正式被国家纳入加强前瞻布局的战略性新兴产业.为更好地把握核技术应用产业高速发展的战略机遇期,本文在《2016-2017核技术应用学科发展报告》研究的基础上,通过进一步调查研究,总结了我国核技术在工业、医学、农业和社会安全领域应用的整体发展情况,以及2018年以来取...     

第四次“王淦昌优秀核科学和核技术论文奖”开始申请

为弘扬中国核学会名誉理事长王淦昌教授为发展我国核科学和核技术事业所作的杰出贡献,并奖励在核科学和核技术研究与应用中写出优秀论文的科技人员,特别是青年科技人员。经中国核学会和中国科学院上海原子核研究所同意,决定从１９９３起在《核技术》和《ＮｕｃｌｅａｒＳｃｉｅｎｃｅ ａｎｄ Ｔｅｃｈｎｉｑｕｅｓ》（ ＮＳＴ）两刊物设立“ 王淦昌优秀核科学和核技术论文奖”作为专项奖金。每两年评选一次,得奖者由中国“王淦昌优秀核科学和核技术论文奖”评选委员会发给奖金和证书。 ２００１年的第五次评奖工作从２００１年１月开始…     

“王淦昌优秀核科学和核技术论文奖”实施细则

经中国核学会和中国科学院上海原子核研究所同意,决定在《核技术》和（（Ｎｕｃｌｅａｅｒ　Ｓｃｉｅｎｃｅ　ａｎｄ　Ｔｅｃｈｎｉｑｕｅｓ》（ＮＳＴ）两刊物设立“王涂昌优秀核科学和核技术论文奖”专项奖。“王淦昌优秀核科学和核技术论文奖”每两年评选一次,具体细则如下：第一条宗旨王淦昌院士在发展我国核科学和核技术事业中作出了重大贡献,为弘扬这位杰出科学家的严谨治学精神,并奖励在核科学和核技术研究与应用中涌现的优秀论文作者,以推动《核技术》和《ＮＳＴ》两刊的发展,特设立“王淦昌优秀核科学和核技术论文奖”专项奖…     

清华大学核技术和放射性同位素应用中的辐射防护

随着核科学技术的发展，核技术与放射性同位素的应用已广泛地应用于工业、农业、国防、医疗卫生和科学研究中。在核技术与放射性同位素的应用中，做好辐射防护工作，确保人员与环境的安全是非常重要的。本文介绍清华大学核技术和放射性同位素应用中的辐射防护工作情况，包括建立防护组织机构，制定规章制度；加强安全教育，普及防护知识；及时检查，定期监测，消除隐患等。     

加强核电子学与探测技术研究促进核科学的发展

近年来核电子学及探测技术的发展对核科学事业的发展及核技术的广泛应用日益起着重要的促进作用。由于它的应用范围早已超出了核科学领域,在学科上、技术上涉及的方面日益扩大,已逐渐成为一门新兴的、有一定独立性的分支学科。该门学科有极为广阔的发展前景,除了在核科学研究、核燃料及核动力工业、核武器效应及核防护测量等方面是一种不可缺少的重要工具外,随着核技术在其它领域的广泛应用,其应用范围也在日益扩     

第二届“王淦昌优秀核科学和核技术论文奖”评定揭晓

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伊朗计划开采铀矿

【世界核新闻机构网站2003年2月10日报道】 伊朗已决定在距离亚兹德200km的萨瓦德地区开采铀矿,并在伊斯法汗和卡尚建立核燃料生产厂。 伊朗总统默罕默德·哈塔米说,政府已决定生产6000 MW的核电。这清楚地表明,伊朗除了目前正在布什尔核电厂建造的1000 MW机组以外,还将进一步发展核电计划。 哈塔米总统说伊朗专家已“掌握了民用核技术知识”,并强调说伊朗在核技术应用领域一贯遵守国际准则。哈塔米总统还说:“我向世界上所有爱好和平的人士保证,伊朗发展核技术的目的仅是民用而绝非其他用途。发展核技术是伊朗人民的合法权利。我们既然需…     

原子核的基础数据库——核科学数据资源共享平台

核数据是指描述和表征原子核这一物质层次的“数据”。它包括:有关原子核性质和由其相互作用支配的基本物理关系的“数据”;描述与原子核有关的基本物理过程,反映核物理基本规律的“数据”;以及对于核物理和核技术的发展及利用是极其关键(和/或重要)的“数据”。在核物理的发展历史中,不断地积累了大量的核数据。基于它们对于核物理及相关学科的基础研究的基本重要性,和在核能及核技术应用中的需要及发展趋势,提出了发展前沿性的核数据,建立《原子核的基础数据库(NBDB)》的计划。这里将介绍NBDB的进展及已提供共享的数据资源。NBDB是一…     

《全国应用核技术学术讨论会》简讯

为了推动核技术应用的研究,促进核技术研究与国民经济更好地结合,中国核物理学会委托中国科学院上海原子核研究所于1980年11月17日到22日在上海首次召开了全国应用核技术学术讨论会。来自工、衣、医、地质、矿冶、生物物理、材料科学和国防方面从事核技术研究与应用的人员,以及有关主管部门、科技情报、刊物编辑部门的101位代表参加了会议。大家聚集一堂,积极、认真地交流核技术研究情况和学术思想,探讨它的发展动向,它和其它学科的相互渗透,并对今后如何开展核技术研究及其应用提出七点建议。     

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.     

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 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.     

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.     

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.     

Assessment of radioactivity levels in some oil samples from the western desert, Egypt

Distributions of natural gamma-emitting radionuclides were determined in 93 oil samples collected from some petroleum fields in the western desert of Egypt. The radioisotope activities in the area under investigation lay in the range of (21 ± 4) to (38 ± 13) Bq?L-1 for 226Ra, (9 ± 2) to (15 ± 5) Bq?L-1 for 232Th, and (154 ± 28) to (303 ± 54) Bq?L-1 for 40K. The mean values were 27, 12, and 201 Bq?L-1, respectively. Among oils, variations in radionuclide ac- tivities could be on account of differences in TDS, HCO3, and Ba, with high or low pH. In this environment, oil prop- erties differently affected the mobilization of natural radionuclides. The range of 226Ra variation had been compared with available data from other countries. The calculated absorbed dose rate ranged from 22.33 to 32.66 nGy?h-1 in lo- cation (B) and (E) respectively, which was less than the accepted value.     

Preparation and properties of 117m Sn(IV)-TTHMP in in-vitro and in small animals

In this work,TTHMP was synthesized and labelled with 117m Sn.The preparation conditions,stability and lipophilicity of 117m Sn(IV)-TTHMP were investigated.Biodistribution of the complex in rabbits and mice was studied.It was found that the quantity of TTHMP and pH value of the prepararion solution had vital effects on the labeling yield of 117m Sn(IV)-TTHMP.It was also found that 117m Sn(IV)-TTHMP was hydrophilic and stable at room temperature and 37℃ in open air 117m Sn(IV)-TTHMP showed unexpectedly high bone uptake and bone-to-blood ratio in the animals.This made it potentially useful as an reagent for skeletal scintigraphy and radiotherapy of bone tumors.     

The role of AGFA high-energy CR in the calibration and quality control of multileaf collimators （MLC）

Linear accelerators equipped with multileaf collimators （MLC） are becoming more common and are widely used in the intensity-modulated radiotherapy （IMRT）. There is an imperative need to ensure the commissioning specification of the linear accelerators for the sake of quality assurance （QA） and quality control （QC）. This paper is aimed to investigate the role of AGFA high-energy CR （Computed Radiography） in calibrating dynamic multileaf collimators and evaluating the accuracy of the leaf position. The result shows that AGFA high-energy CR can easily and conveniently be used to calibrate MLC and verify its position. Hence, the application of AGFA high-energy CR is proved to be an accurate and time-saving method for routine MLC QC, especially when MLC calibration adjustments are required.     

Gamma radiation levels in the ambient environment of the QNPP Base

Monitoring results of gamma dose rate level in 1992～2004 in the ambient environment of the Qinshan Nuclear Power Plants(QNPP)Base,the northeast of Zhejiang Province,are reported in this paper.It is shown that the gamma dose rate of five monitoring sites of 2.5 km to QNPP Base is 84～113 nGy/h,with an average of 96 nGy/h in the 13 years.The average value is close to the background level of 93 nGy/h prior to operation of the QNPP Base,and is lower than the monitoring result of 101 nGy/h at the reference site in Hangzhou City.Within 50 km from the QNPP Base,the cumulative dose rate of the thermoluminescent dosimeter(TLD)is 90 nGy/h,which is lower than the back- ground level of 111 nGy/h.