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terrestrial gamma radiation dose rate
相关语句
  陆地γ辐射剂量率
     ESTIMATION OF THE METHOD ERRORS FOR DEDUCTING THE RESPONSE TO COSMIC-RAY IN MEASURING TERRESTRIAL GAMMA RADIATION DOSE RATE
     测量陆地γ辐射剂量率中扣除宇宙射线响应的方法误差估计
短句来源
     It is needed to deduct the response to cosmic-ray from meter readings R for measuring terrestrial gamma radiation dose rate D_γ by sintilation gamma dose rate meter with energy compensation. For this purpose,there are two methods usually adopted:Method Ⅰ:(?) _(γ,1)=R-R_w((?)
     在用有能量补偿的闪烁型γ辐射剂量率仪测定陆地γ辐射剂量率D_γ时,需要从读数R中扣除对宇宙射线的响应。
短句来源
  相似匹配句对
     Checking Results Analysis for the Measurement of Environmental Terrestrial Gamma-radiation Dose Rate
     环境地表γ辐射剂量率测量比对结果分析
短句来源
     Investigation of 7 Radiation Dose Rate on Terrestrial Environment in Shanghai
     上海市环境陆地γ辐射剂量率调查
短句来源
     ESTIMATION OF THE METHOD ERRORS FOR DEDUCTING THE RESPONSE TO COSMIC-RAY IN MEASURING TERRESTRIAL GAMMA RADIATION DOSE RATE
     测量陆地γ辐射剂量率中扣除宇宙射线响应的方法误差估计
短句来源
     Estimation of Terrestrial γ Radiation Absorbed Dose Rate Using Geochemical Data
     利用地球化学数据估算陆地γ辐射剂量率研究
短句来源
     Problems for Measurements of EnvironmentaI Gamma Radiation Using G-M Counter Dose Rate Monitors
     G-M计数管剂量率仪用于环境辐射水平测量时的一些问题
短句来源
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This paper introduced the principle for establishing the invest-igation program,measures of quality assurance and main resuhs relating tothe investigation of the first environmental natural radioactive level throu-ghout the country including ZheJiang province,Liaoning province,Guizhouprovince,Wuhan city and Baotou city,that was organized by the NationalEnvironmental protection Agency.The total area for investigation was 43.81×10~4 km~2 and the population totalled 11047×10~4,that was respectivelyaccounted for...

This paper introduced the principle for establishing the invest-igation program,measures of quality assurance and main resuhs relating tothe investigation of the first environmental natural radioactive level throu-ghout the country including ZheJiang province,Liaoning province,Guizhouprovince,Wuhan city and Baotou city,that was organized by the NationalEnvironmental protection Agency.The total area for investigation was 43.81×10~4 km~2 and the population totalled 11047×10~4,that was respectivelyaccounted for 4.6% and 10.6% of the whole country.The numbers of mea-suring point for dose rate from terrestrial gamma radiation were 3255,whilethe analysis numbers for soil and water sample were 1335 and 878 respecti-vely.The main measures to be adopted for quality assurance in this investi-gation were as follows:1.Technical co-ordinating group,including the backbone techniciansof radioactivity monitoring in national environmental monitoring system andrelated experts at home,compiled“Tentative rules on the investigation ofnatural environmental radioactive level”.2.Engaging the Institute of the Radiation Protection of the Ministryof Nuclear Industry and the Institute of Atomic Energy as quality assuranceand technical advisory units that are responsible for accepting,calibrating and intercomparing the external exposure dose rate instruments;identifyingthe standard analysis samples and mutnal inspection between laboratories ofU,Th,Ra and K in soil and water;and providing advisory views to“Ter-ntative Rules”and“Implementation Regulation”.3.We have held technical training courses for the main technical super-visors of the units and its basic units which bear the responsibility of inver-stigating task,in order to define their tasks,methords and norms.4.All provinces(cityes)have conducted investigation at selected pintsand established the corresponding“the Implementation Regulation for Tenta-tive Rules”on this base.5.During the investigation of terrestrial gamma radiation level,Weoganized two instrument intecomparisons in April and November,1984 respec-tively.6.We have established a set of quality control system in laboratoriesand between laboratories for the samples analysis of soil and water,wasapproved twice by Institute of Radiation Protection of the Ministry of Nuc-lear Industry.7.We have unified the requests of data processing and final report.The investigation results of the terrestrial gamma radiation dose rate andnatural radionuclides content in soil are illustrated in table 1,and the radio-nuclides concentration is illustrated in table 2

本文介绍了浙江、辽宁、贵州三省及包头、武汉两市环境天然放射性水平调查方案的制定原则,质量保证措施及主要调查结论。对正在进行或即将开展此类工作的其它省(市),本文也提出了若干可供参考的建议。调查结果表明,三省两市陆地γ辐射剂量率(不包括宇宙射线贡献在内的,天然γ辐射在离地面1m 高处空气中产生的吸收剂量率),以省或市为单位的地区平均值在(5.78~7.23)×10~(-8)Gyh~(-1)之间,五省(市)按面积加汉的平均值为6.49×10(?)Gyh~(-1),按人口加权的平均值为6.44×10~(-8)Gyh~(-1)五省(市)土壤和水体中的天然放射性核素含量,基本上属于正常水平;开采与冶炼伴有放射性钍、铀系核素的矿物,是五省(市)人为活动造成环境放射性活染的主要来源。

It is needed to deduct the response to cosmic-ray from meter readings R for measuring terrestrial gamma radiation dose rate D_γ by sintilation gamma dose rate meter with energy compensation.For this purpose,there are two methods usually adopted:Method Ⅰ:(?)_(γ,1)=R-R_w((?)_c/(?)_(cw))Method Ⅱ:(?)_(γ,2)=R-(R_w/R_(w0))(?)_cwhere R_w and R_(w0)are the responsive value of sintilation gamma dose rate meter and high pressure ion-ization chamber respectively above large area...

It is needed to deduct the response to cosmic-ray from meter readings R for measuring terrestrial gamma radiation dose rate D_γ by sintilation gamma dose rate meter with energy compensation.For this purpose,there are two methods usually adopted:Method Ⅰ:(?)_(γ,1)=R-R_w((?)_c/(?)_(cw))Method Ⅱ:(?)_(γ,2)=R-(R_w/R_(w0))(?)_cwhere R_w and R_(w0)are the responsive value of sintilation gamma dose rate meter and high pressure ion-ization chamber respectively above large area of water body near measuring points,D_c and D_(cw) are absorbed dose rate in air at measuring points and above water surface respectively.In this paper,the method errors of the two deducting methods and their variation with △h,(?)_b,R_w/R_(w0) were estimated by:(1)analyzing each component involved in R,R_w and R_(w0) respectively;(2)the range of altitude dif- ference △h between measuring points and the water surface within measuring region;and(3)the mag-nitude and range of other main parameters——meter background dose rate_o,dose rate _(γw),due to ~(222)Rn,~(220)Rn and their daughters in air above the water surface,and R_w,/R_(w0).The results showed that as (?)_γ=6.0×10~(-8)Gy·h~(-1),the method errors of the two deduction methods were less than 3.5 and 2.5% for single measuring point value respectively;and 2.0 and 1.5% respectively for average value from measuring points distributed uniformly over a region of altitude(from 1000 to 1500m)respectively.The characteristics on applicability of the two methods were also discussed.

在用有能量补偿的闪烁型γ辐射剂量率仪测定陆地γ辐射剂量率D_γ时,需要从读数R中扣除对宇宙射线的响应。一般采用以下两种近似扣除方法:方法Ⅰ:D_(γ.1)=R-R_w(D_c/D_cw)方法Ⅱ:D_(γ.2)=R-(R_w/R_(wd))D_c式中,R_w 和 R_(w0)分别是闪烁型剂量率仪和高压电离室在邻近测点的大水面上的响应值;D_e和D_cw分别是在测点和水面处宇宙射线电离成分产生的空气吸收剂量率。本文从分析 R、R_w 和 R_(w0)所包含的各个分量着手,结合实用中测点和水面海拔高度之差△h 的范围和仪器本底剂量率、水面上方空气中氡、(气土)子体和水中γ核素贡献的剂量率、R_w/R_(w0)等参数的大小及范围,估计这两种扣除方法的方法误差及其随△h、D_o、R_w/R_(w0)等主要参数的变化情况。结果表明,在(?)=6.0×10~(-8)Gy·h~(-1)时,用方法Ⅰ,平均值(在海拔高度为1000—1500 m 范围内均匀布点情况下)的方法误差不超过2%。单点方法误差一般不超过3.5%;用方法Ⅱ,平均值的方法误差不超过1.5%,单点方法误差一般不超过2.5%。文中还讨论了两种方法在适用性上的一些...

在用有能量补偿的闪烁型γ辐射剂量率仪测定陆地γ辐射剂量率D_γ时,需要从读数R中扣除对宇宙射线的响应。一般采用以下两种近似扣除方法:方法Ⅰ:D_(γ.1)=R-R_w(D_c/D_cw)方法Ⅱ:D_(γ.2)=R-(R_w/R_(wd))D_c式中,R_w 和 R_(w0)分别是闪烁型剂量率仪和高压电离室在邻近测点的大水面上的响应值;D_e和D_cw分别是在测点和水面处宇宙射线电离成分产生的空气吸收剂量率。本文从分析 R、R_w 和 R_(w0)所包含的各个分量着手,结合实用中测点和水面海拔高度之差△h 的范围和仪器本底剂量率、水面上方空气中氡、(气土)子体和水中γ核素贡献的剂量率、R_w/R_(w0)等参数的大小及范围,估计这两种扣除方法的方法误差及其随△h、D_o、R_w/R_(w0)等主要参数的变化情况。结果表明,在(?)=6.0×10~(-8)Gy·h~(-1)时,用方法Ⅰ,平均值(在海拔高度为1000—1500 m 范围内均匀布点情况下)的方法误差不超过2%。单点方法误差一般不超过3.5%;用方法Ⅱ,平均值的方法误差不超过1.5%,单点方法误差一般不超过2.5%。文中还讨论了两种方法在适用性上的一些特点。

 
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