International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes最新文献_第5页

Estimation of uncertainties in stopping-power ratios using Monte Carlo methods 用蒙特卡罗方法估计停止功率比的不确定性

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-11-01 DOI: 10.1016/0883-2889(92)90021-6

P. Andreo, A. Fransson

引用次数: 3

Ion chromatographic analysis of high specific activity 18FDG preparations and detection of the chemical impurity 2-deoxy-2-chloro-d-glucose 高比活性18FDG制备的离子色谱分析及化学杂质2-脱氧-2-氯-葡萄糖的检测

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-11-01 DOI: 10.1016/0883-2889(92)90002-V

David L. Alexoff, Rosangela Casati , Joanna S. Fowler, Alfred P. Wolf, Colleen Shea, David J. Schlyer, Chyng-Yann Shiue

{"title":"Ion chromatographic analysis of high specific activity 18FDG preparations and detection of the chemical impurity 2-deoxy-2-chloro-d-glucose","authors":"David L. Alexoff, Rosangela Casati , Joanna S. Fowler, Alfred P. Wolf, Colleen Shea, David J. Schlyer, Chyng-Yann Shiue","doi":"10.1016/0883-2889(92)90002-V","DOIUrl":"10.1016/0883-2889(92)90002-V","url":null,"abstract":"<div>Because of the widespread use of 2-deoxy-2-[18F]fluoro-d-glucose (FDG) prepared by the “Julich” method or its variants it was decided necessary to determine the major chemical impurities present in the final product. An analytical system for quantifying FDG was developed using pulsed amperometry after separation by high-performance anion exchange chromatography. With this system a heretofore unidentified impurity, 2-deoxy-2-chloro-d-glucose (ClDG, ca 20–2000 μg; typically < 100 μg), was found in our preparation and in those from other laboratories using the “Julich” method. ClDG arises from Cl− ion displacement during the labeling procedure where Cl− ion comes from several sources, and Cl− ion displacement from the HCl used in the hydrolysis step. FDG mass was present in the same preparations at a level of ca 1–40 μg. Other major chemical constituents were glucose (ca 1–6 mg) and mannose (ca 10–18 μg). Glycerol, arising from sterilizing filters, was also detected in most preparations.Although ClDG is a chemical impurity which has not been detected previously in nca FDG preparations, its biochemical and pharmacological properties are similar to FDG and 2-deoxy-d-glucose. Thus it is unlikely that the presence of small quantities of ClDG found in typical FDG preparations (ca 100 μg) would have adverse pharmacological or toxicological consequences that would limit continued application of this radiopharmaceutical in basic and clinical studies.</div>","PeriodicalId":14288,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes","volume":"43 11","pages":"Pages 1313-1322"},"PeriodicalIF":0.0,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0883-2889(92)90002-V","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12507297","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: 45

The role of diffusion, migration and long-range interaction in energy transfer and quenching processes in an organic liquid scintillator 有机液体闪烁体中扩散、迁移和远程相互作用在能量传递和猝灭过程中的作用

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-11-01 DOI: 10.1016/0883-2889(92)90007-2

B.G. Math, G.C. Chikkur , G.H. Malimath

引用次数: 1

Decay data of 123Tem 123Tem的衰变数据

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-11-01 DOI: 10.1016/0883-2889(92)90001-U

H. Janßen, E. Schönfeld, R. Klein

{"title":"Decay data of 123Tem","authors":"H. Janßen, E. Schönfeld, R. Klein","doi":"10.1016/0883-2889(92)90001-U","DOIUrl":"10.1016/0883-2889(92)90001-U","url":null,"abstract":"<div>Measurements of coincidences between conversion electrons of the 88 keV transition in the 123Tem decay and subsequent 159 keV quanta have been made with a 4πβ-γ coincidence system equipped with a pressurized proportional counter (PPC) in the beta channel. With 123Tem sources prepared for activity determination, a detection probability for conversion electrons, ϵ, very close to ϵ = 1 was achieved. The following data have been derived from the slope of a polynomial fit to nβnγ/nc vs (1 − ϵ)/ϵ by varying ϵ by discrimination and taking into account the γ sensitivity of the PPC (nβ, nγ, nc are the counting rates in the β, γ and coincidence channel): the total conversion coefficient of the 159 keV transition αt = 0.1895(13), the γ-ray emission probability of the 159 keV photons p = 0.8407(9). These data agree with the theoretically calculated values, and with less accurate values determined experimentally by other authors.</div>","PeriodicalId":14288,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes","volume":"43 11","pages":"Pages 1309-1312"},"PeriodicalIF":0.0,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0883-2889(92)90001-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85521984","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

Efficiency of transfer of stored energy from gamma-irradiated NaCl in aqueous ammonium nitrate solution γ辐照NaCl在硝酸铵水溶液中储存能量的转移效率

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI: 10.1016/0883-2889(92)90196-L

C.D. Kalkar, V.M. Raut, R.N. Raut

引用次数: 1

The gamma-ray response of clear polymethylmethacrylate dosimeter radix RN15® 透明聚甲基丙烯酸甲酯剂量计基数RN15®的伽马射线响应

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI: 10.1016/0883-2889(92)90194-J

T. Kojima, N. Haneda, S. Mitomo, H. Tachibana, R. Tanaka

{"title":"The gamma-ray response of clear polymethylmethacrylate dosimeter radix RN15®","authors":"T. Kojima, N. Haneda, S. Mitomo, H. Tachibana, R. Tanaka","doi":"10.1016/0883-2889(92)90194-J","DOIUrl":"10.1016/0883-2889(92)90194-J","url":null,"abstract":"<div>Basic characteristics of different batches of Radix RN15® dosimeter, a commercially available undyed polymethylmethacrylate dosimeter, was studied for its application to process control of radiation sterilization. Radix has relatively small deviation of thickness, optical absorption spectrum, and optical density values before irradiation. The response curves, in terms of net optical density per unit thickness (ΔOD/mm) as a function of absorbed dose, DPMMA, are nearly linear up to 15 kGy and become sublinear at higher doses. Scattering of dose response in 5 dosimeter replicates is ± 1% (1 σ). The dose-response slope at 25 kGy while held at irradiation temperatures in the range 0–60°C, relative to those under 25°C, increases with temperature up to 40°C, the maximum point, and decreases at higher temperatures. Over the temperature range of 10–50°C, the variation with temperature of evaluated dose derived from the calibration curve at 25°C is less than 5% when using a dose rate of 6 kGy/h. At lower dose rates (e.g. 0.7 kGy/h) the irradiation temperature dependence is negligible over this temperature range. The temperature dependence at 40 kGy is less severe than that at 25 kGy. The post-irradiation stability of dose response is less than 5% for more than 100 h after 25 kGy irradiation and storage at 0–35°C. The change in optical density of unirradiated dosimeters 3 years after manufacturing is negligible when the dosimeters are stored at controlled laboratory conditions of temperature (25°C) and relative humidity (40%). The 3-year-old dosimeters by irradiation to a dose of 25 kGy show about 2% lower response than that at 25 kGy at the beginning of the 3-year period.</div>","PeriodicalId":14288,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes","volume":"43 10","pages":"Pages 1197-1202"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0883-2889(92)90194-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82913726","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

Radioactive isotope and isomer separation using the light induced drift effect 利用光诱导漂移效应分离放射性同位素和异构体

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI: 10.1016/0883-2889(92)90204-R

C. Hradecny, J. Slovak , T. Tethal , I.M. Yermolayev , A.M. Shalagin

引用次数: 4

Transport for the nuclear industry 核工业的运输

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI: 10.1016/0883-2889(92)90212-W

Gustav Kafka

引用次数: 0

Ion exchangers in radioactive waste management—V. A case of efficient removal of Ba(II) from aqueous solutions by TiO2 powder—radiotracer study 离子交换剂在放射性废物管理中的应用。TiO2粉末-放射性示踪剂对水溶液中Ba(II)的高效去除研究

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI: 10.1016/0883-2889(92)90203-Q

Shuddhodan P. Mishra, N. Srinivasu, Dhanesh Tiwary

引用次数: 13

Calibration method in isotopic carbon analysis 同位素碳分析中的校正方法

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes Pub Date : 1992-10-01 DOI: 10.1016/0883-2889(92)90206-T

Zhang Weicheng, Li Liwu

引用次数: 0