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Radiation Physics and Chemistry (1977)最新文献

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Application of irradiated wire 辐照线的应用
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90167-0
I. Uda , S. Tada , Y. Takeda , S. Suzuki , K. Kozima, K. Ueno , S. Torisu
{"title":"Application of irradiated wire","authors":"I. Uda ,&nbsp;S. Tada ,&nbsp;Y. Takeda ,&nbsp;S. Suzuki ,&nbsp;K. Kozima,&nbsp;K. Ueno ,&nbsp;S. Torisu","doi":"10.1016/0146-5724(85)90167-0","DOIUrl":"https://doi.org/10.1016/0146-5724(85)90167-0","url":null,"abstract":"<div><p>Rubber insulated wires are still useful for internal wiring in motor vehicles and electrical equipment because of flexibility and toughness. Irradiated cross-linked rubber materials have been successfully introduced for use with fusible link wire and helically coiled cord.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 855-866"},"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)90167-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138343464","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
Radiation effects on poly (vinyl chloride)—I. gas evolution and physical properties of rigid PVC films 辐射对聚氯乙烯的影响。硬质PVC薄膜的气体演化和物理性能
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90028-7
A.H. Zahran, E.A. Hegazy, F.M. Ezz Eldin
{"title":"Radiation effects on poly (vinyl chloride)—I. gas evolution and physical properties of rigid PVC films","authors":"A.H. Zahran,&nbsp;E.A. Hegazy,&nbsp;F.M. Ezz Eldin","doi":"10.1016/0146-5724(85)90028-7","DOIUrl":"10.1016/0146-5724(85)90028-7","url":null,"abstract":"<div><p>Radiation-induced oxidative degradation of PVC films using <sup>60</sup>CO-γ radiation has been investigated at room temperature. Quantitative analyses of evolved gases and oxidative product during irradiation under vacuum conditions and in the presence of oxygen were determined. The <em>G</em>-values of evolved from PVC films irradiated under vacuum were: <em>G</em>(<em>HCl</em>) = 2.3, <em>G</em>(<em>H</em><sub>2</sub>) = 0.18, <em>G</em>(<em>CH</em><sub>4</sub>) = 0.001, <em>G</em>(<em>CO</em><sub>2</sub>) = 0.007, and <em>G</em>(<em>CO</em>) = 0.01 while in the presence of oxygen at an initial pressure of 500 Torr, and the <em>G</em>-values were: <em>G</em>(<em>HCl</em>) = 3.0, <em>G</em>(<em>H</em><sub>2</sub>) = 0.2, <em>G</em>(<em>CH</em><sub>4</sub>) = 0.006, <em>G</em>(<em>CO</em><sub>2</sub>) = 0.09, <em>G</em>(<em>CO</em>) = 0.1, and <em>G</em>(<em>O</em><sub>2</sub>) = 1.5. The evolved gases and oxygen consumption were found to depend on oxygen pressure during irradiation of the PVC films. The intrinsic viscosity of rigid PVC was found to decrease at low doses and then gradually increase at higher ones. This may be due to the oxidative degradation occuring at low doses. On the other hand, crosslinking may be the predominant effect at higher doses. Mechanical properties of irradiated PVC films show that there is no significant change in the tensile strength until 0.6 MGy. Meanwhile, elongation percent increases with dose to reach a maximum at 0.1 MGy, and thereafter it sharply decreases at higher irradiation doses.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 1","pages":"Pages 25-32"},"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)90028-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53753426","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: 23
Radiation chemistry of poly(ethyl methacrylate)—I. Interpretation of ESR spectra 聚甲基丙烯酸乙酯的辐射化学ⅰ。ESR谱的解释
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90029-9
Veli Deniz , Olgun Güven, Turan Özbey
{"title":"Radiation chemistry of poly(ethyl methacrylate)—I. Interpretation of ESR spectra","authors":"Veli Deniz ,&nbsp;Olgun Güven,&nbsp;Turan Özbey","doi":"10.1016/0146-5724(85)90029-9","DOIUrl":"10.1016/0146-5724(85)90029-9","url":null,"abstract":"<div><p>ESR spectra of poly(ethyl methacrylate) γ-irradiated in vacuum at different temperatures were studied in different conditions. The change in the relative intensities of the four-and five-line components of the conventional nine-line spectrum is investigated in detail with respect to changes in the absorbed dose, irradiation, and decay temperatures. It is assumed that the propagating radical is the single radical type responsible for thecharacteristic nine-line spectrum. It is also found that a stable minor radical, quite probably of allyl or polyenyl type, giving a weak broad line, also overlaps the four-line component of the nine-line spectrum.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 1","pages":"Pages 33-38"},"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)90029-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53753475","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: 7
Effect of radiation on the structure of ultrahigh molecular weight polyethylene 辐射对超高分子量聚乙烯结构的影响
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90108-6
Ihab Kamel, Leonard Finegold
{"title":"Effect of radiation on the structure of ultrahigh molecular weight polyethylene","authors":"Ihab Kamel,&nbsp;Leonard Finegold","doi":"10.1016/0146-5724(85)90108-6","DOIUrl":"10.1016/0146-5724(85)90108-6","url":null,"abstract":"<div><p>Radiation sterilization of ultrahigh molecular weight polyethylene (UHMW-PE) was recently found to cause changes in crystallinity, contradicting earlier observations on linear polyethylene of lower molecular weight. In this study, UHMW-PE (Hercules 1900) was gamma-irradiated up to 21 Mrad. Changes in melting and crystallization temperatures, enthalpies of melting and of crystallization, determined by differential scanning calorimetry, are reported. In particular, the temperature at the onset of crystallization provided a clearer view of the radiation damage to the polymer chains. A mechanism based on chain scission is proposed to explain the observed increase in crystallinity in agreement with recent findings. The crystallization temperature may be useful as an indicator of radiation and/or other damage to the UHMW-PE.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 6","pages":"Pages 685-691"},"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)90108-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53755979","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
Trapped electron in frozen ionic solutions—II. Asymmetry and relaxation of electron traps 冻结离子溶液中的俘获电子ⅱ。电子陷阱的不对称性和弛豫
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90109-8
Maria Hilczer , Witold M. Bartczak , Miroslaw Sopek
{"title":"Trapped electron in frozen ionic solutions—II. Asymmetry and relaxation of electron traps","authors":"Maria Hilczer ,&nbsp;Witold M. Bartczak ,&nbsp;Miroslaw Sopek","doi":"10.1016/0146-5724(85)90109-8","DOIUrl":"10.1016/0146-5724(85)90109-8","url":null,"abstract":"<div><p>The theoretical model of the electron localized in frozen ionic solutions has been applied to investigate the influence of the trap distortion on the electron energy levels in the trap. It has been found that asymmetric traps are slightly more shallow than the symmetrical trap. The differences between electron absorption spectra obtained by pulse radiolysis and those by γ-radiolysis are then explained in terms of the relaxation of distorted ionic traps.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 6","pages":"Pages 693-695"},"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)90109-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53756097","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
Ionic species produced on gamma radiolysis: Studies by matrix isolation technique—I. Electronic absorption spectra of perfluorosubstituted aromatic radical anions 射线裂解产生的离子种类:基质分离技术的研究——ⅰ。全氟取代芳基阴离子的电子吸收光谱
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90116-5
Lian C.T. Shou-te, Jai P. Mittal
{"title":"Ionic species produced on gamma radiolysis: Studies by matrix isolation technique—I. Electronic absorption spectra of perfluorosubstituted aromatic radical anions","authors":"Lian C.T. Shou-te,&nbsp;Jai P. Mittal","doi":"10.1016/0146-5724(85)90116-5","DOIUrl":"10.1016/0146-5724(85)90116-5","url":null,"abstract":"<div><p>The absorption spectra of several perfluorosubstituted aromatic radical anions are compared with the corresponding perhydro compounds in which the various transitions involved have been assigned to those predicted theoretically. The electronic absorption spectra were obtained for pentafluorostyrene, pentafluorobenzaldehyde, pentafluorobenzoic acid, pentafluorobenzonitride, tetrafluorophthalic acid and pentafluoroaniline, by gamma radiolysis in 2-methyltetrahydrofuran at 77 K. A general similarity in the absorption spectra between the perfluorinated and the corresponding perhydro radical anion is observed except for a shift in the absorption band.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 6","pages":"Pages 739-743"},"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)90116-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53757504","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
Advances on oxygen radicals and radioprotectors 氧自由基与放射性保护剂的研究进展
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90118-9
John Butler
{"title":"Advances on oxygen radicals and radioprotectors","authors":"John Butler","doi":"10.1016/0146-5724(85)90118-9","DOIUrl":"10.1016/0146-5724(85)90118-9","url":null,"abstract":"","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 6","pages":"Page 746"},"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)90118-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53757652","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: 11
UV curing by radical, cationic and concurrent radical-cationic polymerization 紫外线固化采用自由基聚合、阳离子聚合和自由基-阳离子同步聚合
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90143-8
S.Peter Pappas
{"title":"UV curing by radical, cationic and concurrent radical-cationic polymerization","authors":"S.Peter Pappas","doi":"10.1016/0146-5724(85)90143-8","DOIUrl":"10.1016/0146-5724(85)90143-8","url":null,"abstract":"<div><p>UV and EB curing represent complementary technologies with respective advantages and disadvantages. This paper deals with the design and evaluation of UV curable coatings to optimize cure rate and film properties. Topics included are state-of-the-art photoinitiator systems, light intensity effects, retardation of air-inhibition, adhesion, and amplification of photons for enhanced speed of cure.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 633-641"},"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)90143-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53759164","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: 33
EBC machine with large section beam adapted on high speed lines IRELEC “Laminar” concept 大截面梁EBC机适用于高速线路IRELEC“层流”概念
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90147-5
F. Danel, J.L. Rechatin
{"title":"EBC machine with large section beam adapted on high speed lines IRELEC “Laminar” concept","authors":"F. Danel,&nbsp;J.L. Rechatin","doi":"10.1016/0146-5724(85)90147-5","DOIUrl":"10.1016/0146-5724(85)90147-5","url":null,"abstract":"<div><p>Secondary emission sources “Laminar Process” allow the extension of the section of the beam in two directions and to control the density of the dose in any place of the beam.</p><p>Consequently the dose rate can be modulated and no beam is applied to the support of the window which allows much higher flux and less cooling problems.</p><p>This development has pushed us to develop a new type of inerting chamber with low leakage and automatic adaptation to the thickness of the product to be treated.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 681-682"},"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)90147-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53759279","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 bright pulsed x-ray source for soft x-ray research and processing applications 一种用于软x射线研究和处理应用的明亮脉冲x射线源
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90151-7
J.S. Pearlman, J.C. Riordan, A.C. Kolb
{"title":"A bright pulsed x-ray source for soft x-ray research and processing applications","authors":"J.S. Pearlman,&nbsp;J.C. Riordan,&nbsp;A.C. Kolb","doi":"10.1016/0146-5724(85)90151-7","DOIUrl":"10.1016/0146-5724(85)90151-7","url":null,"abstract":"<div><p>Recent developments in soft X-ray technology open new possibilities in areas such as surface processing and microscopic examinations of both biological tissues and thin films. These developments, along with the development of a compact, bright laboratory soft X-ray source, make it possible to use soft X-ray technology in individual laboratories and processing facilities. The most promising sources for laboratory applications are baseed on magnetic compression of a gas discharge. Magnetic compression creates a hot dense plasma which is an intense source of soft X-rays in the 100 to 3000 eV range. Applications demonstrated at Maxwell and elsewhere include X-ray lithography, X-ray microscopy, surface annealing, X-ray diffraction and EXAFS.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 709-718"},"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)90151-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53759461","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
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