The International journal of applied radiation and isotopes最新文献

筛选
英文 中文
Determination of solids weight fraction and ash content of coal in slurries of variable voidage: Laboratory measurements 变孔隙浆料中煤的固体重量、分数和灰分含量的测定。实验室测量
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90021-3
V.L. Gravitis, J.S. Watt, H. Zastawny
{"title":"Determination of solids weight fraction and ash content of coal in slurries of variable voidage: Laboratory measurements","authors":"V.L. Gravitis,&nbsp;J.S. Watt,&nbsp;H. Zastawny","doi":"10.1016/0020-708X(85)90021-3","DOIUrl":"10.1016/0020-708X(85)90021-3","url":null,"abstract":"<div><p>Nuclear techniques have been used to determine the solids weight fraction (<em>W</em>) and ash content of (fine) coal in slurries independent of voidage. The basis of the techniques is the correlation between <em>W</em> and the hydrogen concentration (w/w) of the slurry. At constant ash content, <em>W</em> is determined by combining neutron moderation and γ-ray transmission (density) measurements. With varying ash content, both <em>W</em> and ash content of coal are determined by combining the above measurements with either of two well-established techniques for the determination of ash content of dry coal, namely x-ray backscatter compensated by iron K x-ray excitation, and low energy γ-ray transmission.</p><p>Radioisotope source and detector were incorporated into three probes which were immersed directly into coal slurry in a 200 L drum. Measurements were made on coal slurries with <em>W</em> in the range 5–22 wt%. ash in coal 20.7–30 wt%, and voidage 0–4 vol.%. The r.m.s. difference between <em>W</em> determined by probe measurements and <em>W</em> obtained from assay of slurry samples was 0.54 wt%, a factor of five better than that obtained from the γ-ray transmission (density) measurement alone. The r.m.s. difference for ash content, based on the x-ray backscatter method combined with neutron and γ-ray (density) count rates, was 0.78 wt% ash.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 879-887"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90021-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89122001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Reusability and Fractional read-out in CaF2:Tm (TLD-300) CaF2:Tm (TLD-300)的可重用性和分数读出
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90023-7
C. Furetta , J.W.N. Tuyn , Y.-K. Lee
{"title":"Reusability and Fractional read-out in CaF2:Tm (TLD-300)","authors":"C. Furetta ,&nbsp;J.W.N. Tuyn ,&nbsp;Y.-K. Lee","doi":"10.1016/0020-708X(85)90023-7","DOIUrl":"10.1016/0020-708X(85)90023-7","url":null,"abstract":"<div><p>The first part of this paper is concerned with the reusability of CaF<sub>2</sub>:Tm (TLD-300) ribbon without thermal treatment between read-out and irradiation. It has been checked up to a dose level of about 200 mGy and the results show that it is possible to reuse this material without annealing in the used dose range. In the second part of the paper a fractional method of TL readings is outlined. The peak separation is checked at different linear testing rates and with different reading times for each peak. The separation technique is then checked in a dose accumulation experiment.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 893-896"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90023-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76794166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Microcomputer control of radiochemical processes 放射化学过程的微机控制
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90027-4
Stuart C. Sweet, Henry C. Griffin
{"title":"Microcomputer control of radiochemical processes","authors":"Stuart C. Sweet,&nbsp;Henry C. Griffin","doi":"10.1016/0020-708X(85)90027-4","DOIUrl":"10.1016/0020-708X(85)90027-4","url":null,"abstract":"<div><p>A system for control of radiochemical processes has been designed and constructed. Control passes through a single 8-bit port (6522 VIA) to up to 64 on-off sensors and 64 on-off switches. The outputs are latched; they are switched one at a time.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 908-910"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90027-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88534282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Synthesis of 15O-labeled butanol via organoborane chemistry 有机硼烷化学法合成15o标记丁醇
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90017-1
G.W. Kabalka , R.M. Lambrecht , M. Sajjad , J.S. Fowler , S.A. Kunda , G.W. McCollum , R. MacGregor
{"title":"Synthesis of 15O-labeled butanol via organoborane chemistry","authors":"G.W. Kabalka ,&nbsp;R.M. Lambrecht ,&nbsp;M. Sajjad ,&nbsp;J.S. Fowler ,&nbsp;S.A. Kunda ,&nbsp;G.W. McCollum ,&nbsp;R. MacGregor","doi":"10.1016/0020-708X(85)90017-1","DOIUrl":"10.1016/0020-708X(85)90017-1","url":null,"abstract":"<div><p>Oxygen-15 labeled 1-butanol and 2-butanol were prepared by the reaction of O<sub>2</sub>−<sup>15</sup>O with tri-<em>n</em>-butylborane and tri-<em>sec</em>-butylborane in tetrahydrofuran. The reaction products were isolated and identified via reversed-phase high performance column chromatography and gas chromatography. Radiochemical yields of 50% (EOB) were obtained. The use of <sup>15</sup>O-labeled butanol is suggested for cerebral blood flow measurements in conjunction with PET.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 853-855"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90017-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15177402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 46
Monte Carlo simulation of an iron ore analyser 铁矿分析仪的蒙特卡罗模拟
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90022-5
M.T. Rainbow
{"title":"Monte Carlo simulation of an iron ore analyser","authors":"M.T. Rainbow","doi":"10.1016/0020-708X(85)90022-5","DOIUrl":"10.1016/0020-708X(85)90022-5","url":null,"abstract":"<div><p>The general purpose Monte Carlo code MORSE and nuclear data derived from ENDF/B-IV are used to model an iron ore analyser which detects thermal neutron capture γ rays from <sup>56</sup>Fe. Measurements on an actual system have been simulated. Calculated detector count rates agree, after normalisation, with measured values to within the accuracy of the calculations (∼5% at 1σ). Practical use of the model is dependent upon improving the efficiency of the calculations.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 889-892"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90022-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88647449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Dual energy gamma-ray transmission techniques applied to on-line analysis in the coal and mineral industries 双能伽玛射线传输技术在煤炭和矿产工业在线分析中的应用
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90020-1
J.S. Watt, E.J. Steffner
{"title":"Dual energy gamma-ray transmission techniques applied to on-line analysis in the coal and mineral industries","authors":"J.S. Watt,&nbsp;E.J. Steffner","doi":"10.1016/0020-708X(85)90020-1","DOIUrl":"10.1016/0020-708X(85)90020-1","url":null,"abstract":"<div><p>The use of dual energy γ-ray transmission techniques to determine the concentration of a higher atomic number (<em>Z</em>) component in a lower <em>Z</em> matrix is investigated. Examples discussed are the determination of lead in lead-zinc ore, iron in high-grade iron ore, uranium in solution, and ash in coal. These examples are considered in relation to the main application fields of on-stream analysis of mineral slurries and solutions, on-line analysis on conveyors, and scanning of borecores.</p><p>A method for reducing errors in analysis by compensating for variations in concentration of some of the wanted or matrix components is proposed. This method depends on choice of one γ-ray energy in the photoelectric absorption region and the other in the pair production region. Calculations show that this method reduces errors in the determination of ash in coal caused by variation in concentration of iron in the ash. However, sensitivity to ash is poor, so this application is suitable only when γ-ray path lengths in the coal are large.</p><p>Preliminary results are presented of the combination of dual energy γ-ray transmission and pair production techniques to give an estimate of iron concentration in coal. This can be used to give an approximate estimate of sulphur in pyrites in coal, assuming that iron is present only as pyrites.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 867-877"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90020-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80220005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
The production of iodine-123 on the LNP JINR synchrocyclotron LNP JINR同步回旋加速器上碘-123的产生
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90024-9
N.G. Zaitseva, Z. Hons, V.A. Khalkin, O. Knotek, V.I. Sobolev
{"title":"The production of iodine-123 on the LNP JINR synchrocyclotron","authors":"N.G. Zaitseva,&nbsp;Z. Hons,&nbsp;V.A. Khalkin,&nbsp;O. Knotek,&nbsp;V.I. Sobolev","doi":"10.1016/0020-708X(85)90024-9","DOIUrl":"10.1016/0020-708X(85)90024-9","url":null,"abstract":"<div><p>A diagrammatic lay-out of the facility for the on-line radioiodine (<sup>123</sup>Xe) by CsCl irradiation on the LNP JINR synchrocyclotron is presented. The problems in designing the target, collection systems and radioxenon transport are considered. The described experimental arrangement is a model for future <sup>123</sup>I production on the “F”-facility (JINR high-current accelerator).</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 897-901"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90024-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86713154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Preparation of CH3203HgCl of high specific activity 高比活性CH3203HgCl的制备
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90025-0
T.Y. Toribara
{"title":"Preparation of CH3203HgCl of high specific activity","authors":"T.Y. Toribara","doi":"10.1016/0020-708X(85)90025-0","DOIUrl":"10.1016/0020-708X(85)90025-0","url":null,"abstract":"<div><p>In order to have a methylmercury compound of much higher specific activity than was obtainable from commercial suppliers of the compound, a procedure for the methylation of radioactive mercuric chloride with no addition of non-radioactive mercury has been developed. Methylation is accomplished by reacting the mercuric chloride with tetramethyl tin. Extractions into and out of benzene twice produces a methylmercury compound which is finally dissolved in a dilute sodium carbonate solution suitable for biological experiments. The entire procedure to produce a batch of the compound may be accomplished within a single day.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 903-904"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90025-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15022117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 35
Comparison of calculated absolute full-energy peak efficiencies of CdTe and NaI detectors in the photon energy region of 15–2000 keV CdTe和NaI探测器在15-2000 keV光子区域的计算绝对全能峰值效率的比较
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90018-3
R. Rieppo
{"title":"Comparison of calculated absolute full-energy peak efficiencies of CdTe and NaI detectors in the photon energy region of 15–2000 keV","authors":"R. Rieppo","doi":"10.1016/0020-708X(85)90018-3","DOIUrl":"10.1016/0020-708X(85)90018-3","url":null,"abstract":"<div><p>A comparison of the calculated absolute full-energy peak efficiencies of CdTe and NaI detectors, i.e. the ratio of the number of counts under the full-energy peak (FEP) to the number of photons at the same energy emitted by the source, is made for six different detectors and three source sizes. The CdTe and NaI detectors are assumed to be of equal volume. The calculations are performed in the photon energy region 15-2000 keV using water, muscle and blood as source media.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 857-859"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90018-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78735523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Calculated absolute full-energy peak efficiencies for true coaxial Ge(Li) detectors in the photon energy region 0.1–3.0 MeV with different source-to-detector geometries 计算了不同源-探测器几何形状下,真同轴Ge(Li)探测器在0.1-3.0 MeV光子能量区域的绝对全能峰值效率
The International journal of applied radiation and isotopes Pub Date : 1985-11-01 DOI: 10.1016/0020-708X(85)90019-5
R. Rieppo
{"title":"Calculated absolute full-energy peak efficiencies for true coaxial Ge(Li) detectors in the photon energy region 0.1–3.0 MeV with different source-to-detector geometries","authors":"R. Rieppo","doi":"10.1016/0020-708X(85)90019-5","DOIUrl":"10.1016/0020-708X(85)90019-5","url":null,"abstract":"<div><p>Absolute full-energy peak efficiencies, i.e. the ratio of the number of counts under the full-energy peak (FEP) to the number of photons at the same energy emitted by the source, are calculated for three true coaxial Ge(Li) detectors of differing size in the photon energy region 0.1–3.0 MeV. The detector volumes are 28.9, 82.1 and 144.9 cm<sup>3</sup>. Three different source-to-detector geometries are considered, namely a point source, a needle-shaped source and an extended volume source. The attenuation effects in the sources, the aluminium windows of the detectors and the p-cores of the detectors are taken into account. Three different media are considered in the extended sources.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 11","pages":"Pages 861-865"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90019-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79068665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信