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Radiation Physics and Chemistry (1977)最新文献

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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 Epub Date: 2002-10-09 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
The effects of various monomers on crosslinking efficiency 不同单体对交联效率的影响
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90165-7
R.W. Waldron, H.F. McRae, J.D. Madison
{"title":"The effects of various monomers on crosslinking efficiency","authors":"R.W. Waldron,&nbsp;H.F. McRae,&nbsp;J.D. Madison","doi":"10.1016/0146-5724(85)90165-7","DOIUrl":"10.1016/0146-5724(85)90165-7","url":null,"abstract":"<div><p>The addition of polyfunctional monomers when compounding radiation cured polymers increases the crosslinking efficiency of the radiation. Various monomers were added to a flame retarded base formulation to investigate their crosslinking efficiency. These samples were then crosslinked by electron beam irradiation and their physical properties were measured. Variations were noted in tensile strength, elongation, and gel/swell tests. The monomers studied were di<sup>-</sup>, tri<sup>-</sup>, and tetra-functional, and represented a wide range of effects on the physical properties.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 843-848"},"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)90165-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53759993","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: 18
Protonation of the reduced species in irradiated acetonitrile 辐照乙腈中还原物的质子化
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90187-6
W.A Mulac, A Bromberg, D Meisel
{"title":"Protonation of the reduced species in irradiated acetonitrile","authors":"W.A Mulac,&nbsp;A Bromberg,&nbsp;D Meisel","doi":"10.1016/0146-5724(85)90187-6","DOIUrl":"10.1016/0146-5724(85)90187-6","url":null,"abstract":"<div><p>The rate of the reaction of the radiolytically produced reduced species in acetonitrile with various protic solutes (alcohols and water) was measured by the competition method and by directly following the rate of disappearance of the reduced species in pulse radiolytic experiments. The rate constants thus obtained were correlated with the <em>pK<sub><em>a</em></sub></em> of the protic additives. This correlation leads to the conclusion that the reaction occurs via a proton transfer. Temperature effect studies on the rate of this reaction lead to the conclusion that the reactive species is the dimer anion radical (CH<sub>3</sub>CN)<sup>-</sup><sub>2</sub>.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 2","pages":"Pages 205-209"},"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)90187-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53761267","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
Energy transfer in irradiated cyclohexane solutions 辐照环己烷溶液中的能量转移
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90201-8
L.H. Luthjens, H.C. de Leng, L. Wojna´rovits, A. Hummel
{"title":"Energy transfer in irradiated cyclohexane solutions","authors":"L.H. Luthjens,&nbsp;H.C. de Leng,&nbsp;L. Wojna´rovits,&nbsp;A. Hummel","doi":"10.1016/0146-5724(85)90201-8","DOIUrl":"10.1016/0146-5724(85)90201-8","url":null,"abstract":"<div><p>From the decrease of yield of solvent fluorescent excited states in cyclohexane by the electron scavenger CO<sub>2</sub> the efficiency of formation of this excited state from ion recombination is found to be 0.4 ± 0.1. Energy transfer studies using cis-decalin as a solute seem to provide evidence for the formation of higher excited states in irradiated cyclohexane with a yield of 0.8 (100 eV)<sup>-1</sup>. These states are capable of fast energy transfer to the solute.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 5","pages":"Pages 509-511"},"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)90201-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53761798","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: 12
EB curable wetting resins for magnetic media coatings 磁性介质涂料用EB固化湿性树脂
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90138-4
L. Laskin, R.E. Ansel, K.P. Murray, S.R. Schmid
{"title":"EB curable wetting resins for magnetic media coatings","authors":"L. Laskin,&nbsp;R.E. Ansel,&nbsp;K.P. Murray,&nbsp;S.R. Schmid","doi":"10.1016/0146-5724(85)90138-4","DOIUrl":"10.1016/0146-5724(85)90138-4","url":null,"abstract":"<div><p>The magnetic media industry is studying means to improve the recording density, durability, product uniformity and production efficiency and to reduce wetting agent migration in the magnetic film. The use of electron beam curable resin binders for magnetic coatings is one of the approaches being studied for this.</p><p>This paper compares the wetting efficiencies of several electron beam curable systems with a conventional resin and a conventional wetting agent. In this study it has been demonstrated that EB resins can be designed to effect proper magnetic pigment dispersion.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 587-598"},"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)90138-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110502639","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
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 Epub Date: 2002-10-09 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 Epub Date: 2002-10-09 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
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 Epub Date: 2002-10-09 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 Epub Date: 2002-10-09 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
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 Epub Date: 2002-10-09 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
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