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Radiation Physics and Chemistry (1977)最新文献

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Decomposition of hydrogen peroxide on silver-nickel oxide two-component catalysts and the effects of ionizing radition 过氧化氢在银镍氧化物双组分催化剂上的分解及电离辐射的影响
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90175-X
V Múčka, R Silber
{"title":"Decomposition of hydrogen peroxide on silver-nickel oxide two-component catalysts and the effects of ionizing radition","authors":"V Múčka,&nbsp;R Silber","doi":"10.1016/0146-5724(85)90175-X","DOIUrl":"10.1016/0146-5724(85)90175-X","url":null,"abstract":"<div><p>The decomposition of hydrogen peroxide in aqueous solution has been studied on silver-nickel oxide two-component catalysts containing various proportions of the components covering the entire region of 0–100% of one component. The catalytic activity of the system appears to be a non-monotonic function of its' composition. The activity of the samples containing 0–91 wt% NiO is determined by the catalytic efficiency of the silver component present in the catalyst and this efficiency seems to be connected with the surface concentration of Ag<sup>+</sup> ions. The catalytic activity of samples containing more than 91 wt% NiO is determined by the activity of the nickel oxide. The γ irradiation (dose 10 kGy) of samples containing an excess of silver leads to a lower catalytic activity and irradiation of samples with a higher content of nickel oxide increases its' activity. Irradiation of catalysts with fast neutrons appreciably decreases their activity, irrespective of their composition, while irradiation with β radiation (dose 5.6 MGy) has no effect on their activity.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 2","pages":"Pages 121-126"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90175-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53760686","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: 4
Studies on irradiation of agar-agar in the solid state: On the changes of colloid titration value of agar-agar hydrosol produced by irradiation 琼脂固体辐照的研究:辐照后琼脂纯溶胶胶体滴定值的变化
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90190-6
Mizuho Nisizawa
{"title":"Studies on irradiation of agar-agar in the solid state: On the changes of colloid titration value of agar-agar hydrosol produced by irradiation","authors":"Mizuho Nisizawa","doi":"10.1016/0146-5724(85)90190-6","DOIUrl":"10.1016/0146-5724(85)90190-6","url":null,"abstract":"<div><p>Solid agar-agar was irradiated with <sup>60</sup>Co gamma rays, and the effects of radiation on the electrolytic groups (sulfate group) of the agar-agar molecule were studied by colloid titrimetry. The after effects were also studied. Empirical equations for changes of colloid titration value were obtained.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 2","pages":"Pages 227-228"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90190-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53761759","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: 0
The effect of radiation on corrosion of steel in high-temperature water 辐射对高温水中钢腐蚀的影响
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90216-X
B.G. Ershov, A.I. Milaev, V.G. Petrosyan, N.I. Kartashov, P.Ya. Glasunov, S.A. Tevlin
{"title":"The effect of radiation on corrosion of steel in high-temperature water","authors":"B.G. Ershov,&nbsp;A.I. Milaev,&nbsp;V.G. Petrosyan,&nbsp;N.I. Kartashov,&nbsp;P.Ya. Glasunov,&nbsp;S.A. Tevlin","doi":"10.1016/0146-5724(85)90216-X","DOIUrl":"10.1016/0146-5724(85)90216-X","url":null,"abstract":"<div><p>The effect of gamma radiation on the corrosion of carbon St20 and stainless steel OX18H10T contacting high-temperature water have been studied. It was shown that irradiation does not seem to have a marked effect on the corrosion of stainless steel and accelerates the corrosion of carbon steel (3–4 times). The empirical equation of the corrosion rate dependence on the time of experimentation were found. The concentration of H<sub>2</sub>O<sub>2</sub> in irradiated water contacting carbon steel changes by the fluctuation law with a period of 20–25 h and remains at the same level as for carbon steel.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 5","pages":"Pages 587-590"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90216-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53762590","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
Thermal effects in radiation processing 辐射加工中的热效应
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90276-6
Z.P. Zagórski
{"title":"Thermal effects in radiation processing","authors":"Z.P. Zagórski","doi":"10.1016/0146-5724(85)90276-6","DOIUrl":"10.1016/0146-5724(85)90276-6","url":null,"abstract":"<div><p>The balance of ionizing radiation energy incident on an object being processed is discussed in terms of energy losses, influencing the amount really absorbed. To obtain the amount of heat produced, the absorbed energy is corrected for the change in internal energy of the system and for the heat effect of secondary reactions developing after the initiation. The temperature of a processed object results from the heat evolved and from the specific heat of the material comprising the object. The c<sub>p</sub> of most materials is usually much lower than that of aqueous systems and therefore temperatures after irradiation are higher. The role of low specific heat in radiation processing at cryogenic conditions is stressed. Adiabatic conditions of accelerator irradiation are contrasted with the steady state thermal conditions prevailing in large gamma sources. Among specific questions discussed in the last part of the paper are: intermediate and final temperature of composite materials, measurement of real thermal effects in situ, neutralization of undesired warming experienced during radiation processing, processing at temperatures other than ambient and administration of very high doses of radiation.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 291-303"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90276-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53764584","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: 6
Thermal stability of radiation curable materials 辐射固化材料的热稳定性
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90279-1
V.P. Thalacker, T.E. Boettcher
{"title":"Thermal stability of radiation curable materials","authors":"V.P. Thalacker,&nbsp;T.E. Boettcher","doi":"10.1016/0146-5724(85)90279-1","DOIUrl":"10.1016/0146-5724(85)90279-1","url":null,"abstract":"<div><p>The thermal stability of radiation curable materials was determined via TGA measurements and related to functionality, chemical type, and cure conditions. The results indicate that Tri-, Tetra-, and Penta- functional acrylates are more thermally stable than lower functional acrylates and that acrylates have better thermal stability than methacrylates. A comparison of EB, UV, and thermal curing conditions for TMPTA showed that EB-cured material was more thermally stable than UV and that thermally cured TMPTA was the least stable. The thermal stability of acrylated epoxy oligomers is again in the order of increasing functionality The <sup>13</sup>C carbonyl region and oxygen permeability measurements were used to determine the extent of cure and then related to thermal stability.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 323-332"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90279-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53764832","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: 8
The radiolysis of mixtures of CF2Cl2 with RH substrates CF2Cl2与RH底物混合物的辐射分解
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90038-X
Shlomo Mosseri, Zeev B. Alfassi, W. Fürst, H. Heusinger
{"title":"The radiolysis of mixtures of CF2Cl2 with RH substrates","authors":"Shlomo Mosseri,&nbsp;Zeev B. Alfassi,&nbsp;W. Fürst,&nbsp;H. Heusinger","doi":"10.1016/0146-5724(85)90038-X","DOIUrl":"10.1016/0146-5724(85)90038-X","url":null,"abstract":"<div><p>The radiation induced hydrogen abstraction from hydrogen-containing substrates, by CF<sub>2</sub>Cl radical was studied in CF<sub>2</sub>Cl<sub>2</sub> solution as a function of the RH concentration (where RH is cyclohexane, cyclohexene, and ethanol) and as a function of temperature in the range of -80 to +20°C. For the CF<sub>2</sub>Cl<sub>2</sub>-ethanol system it was found that the ratio between the concentration of the abstraction product CHF<sub>2</sub>Cl and the square root of the concentration of the recombination product (CF<sub>2</sub>Cl)<sub>2</sub> is linearly dependent on the ethanol concentration (as was expected). However, for the two other systems, no dependence was found between this ratio and the concentration of the hydrogen containing substrate. A new mechanism for explaining those results was suggested.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 1","pages":"Pages 89-101"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90038-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53754171","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: 0
A chain mechanism of radiolysis and photolysis in H[AuCl4]-polyvinyl alcohol system H[AuCl4]-聚乙烯醇体系辐射分解和光分解链式机理研究
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90064-0
A.P. Fedorova, A.L. Kartuzhanski, B.J. Peshchevitski, B.T. Plachenov
{"title":"A chain mechanism of radiolysis and photolysis in H[AuCl4]-polyvinyl alcohol system","authors":"A.P. Fedorova,&nbsp;A.L. Kartuzhanski,&nbsp;B.J. Peshchevitski,&nbsp;B.T. Plachenov","doi":"10.1016/0146-5724(85)90064-0","DOIUrl":"10.1016/0146-5724(85)90064-0","url":null,"abstract":"<div><p>A study of optical properties of H[AuCl<sub>4</sub>]-containing polyvinyl alcohol (PVA) films allows the basis of a chain mechanism of their photolysis and radiolysis to be put forward. A suggestion is made, that in these chain reactions the Cl radical functions as an active particle, initiating the formation of two interacting chains in reactions of this radical with PVA and [AuCl<sub>4</sub>]<sup>-</sup> ions correspondingly.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 3","pages":"Pages 273-276"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90064-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53754490","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
The radiation chemistry of polyetherimides 聚醚酰亚胺的辐射化学
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90287-0
Rafil Basheer , Malcolm Dole
{"title":"The radiation chemistry of polyetherimides","authors":"Rafil Basheer ,&nbsp;Malcolm Dole","doi":"10.1016/0146-5724(85)90287-0","DOIUrl":"10.1016/0146-5724(85)90287-0","url":null,"abstract":"<div><p>G-values for crosslinking, G(X) and for chain scissions, G(S), have been determined for the electron beam irradiation at room temperature in vacuum of a polyetherimide called ULTEM by General Electric Co.. In addition, ESR studies of the free radicals produced in ULTEM by γ-irradiation in vacuum at 77K have also been carried out. In the electron beam irradiation experiments the very low G(X) and G(S) values, only 0.014 and 0.005 respectively, demonstrate the high radiation stability of this material. The decay at 70° and 160°C of the free radicals in the electron beam irradiated samples accurately followed the Waite equation. Also the solubility-dose data could be accurately interpreted in terms of the Charlesby-Pinner equation.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 389-398"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90287-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53765263","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: 16
Radiation research at the central institute of isotope and radiation research, Leipzig 莱比锡中央同位素与辐射研究所的辐射研究
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90193-1
K. Wetzel
{"title":"Radiation research at the central institute of isotope and radiation research, Leipzig","authors":"K. Wetzel","doi":"10.1016/0146-5724(85)90193-1","DOIUrl":"10.1016/0146-5724(85)90193-1","url":null,"abstract":"<div><p>The investigations of the Central Institute of Isotope and Radiation Research on the interaction between ionizing radiation and matter are devoted to the development of methods for analyzing chemical composition and structural parameters and to establishing the scientific basis of the development of irradiation technology. A brief survey on fundamental and applied research in these fields is given.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 5","pages":"Pages 459-461"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90193-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"108587387","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: 0
Organizing committee 组织委员会
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90240-7
{"title":"Organizing committee","authors":"","doi":"10.1016/0146-5724(85)90240-7","DOIUrl":"https://doi.org/10.1016/0146-5724(85)90240-7","url":null,"abstract":"","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Page xii"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90240-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136888116","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: 0
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