Radiation Physics and Chemistry (1977)最新文献

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Picosecond-pulse radiolysis studies to understand the primary processes in radiolysis 皮秒脉冲辐射分解研究,了解辐射分解的主要过程
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90197-9
Charles D. Jonah, Michele A. Lewis
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引用次数: 6
IMRP 5 awards for contributions to the field of radiation processing IMRP 5奖,奖励对辐射处理领域的贡献
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90241-9
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引用次数: 0
Spectral properties and kinetics of cationic transients generated in electron-pulse-irradiated alkanes 电子脉冲辐照烷烃中阳离子瞬变的光谱特性和动力学
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90199-2
R. Mehnert, O. Brede, W. Naumann
{"title":"Spectral properties and kinetics of cationic transients generated in electron-pulse-irradiated alkanes","authors":"R. Mehnert,&nbsp;O. Brede,&nbsp;W. Naumann","doi":"10.1016/0146-5724(85)90199-2","DOIUrl":"10.1016/0146-5724(85)90199-2","url":null,"abstract":"<div><p>After electron-pulse irradiation of liquid cyclohexane and methylcyclohexane containing carbon tetrachloride as an electron scavenger, transient optical absorption bands were observed with peak wavelengths of about 500 nm. The bands are assigned to the corresponding alkane radical cations. Solute cation formation was studied in cyclohexane using solutes as<em>n</em>-decane,<em>n</em>-dodecane,<em>n</em>-hexadecane and benzene. It is shown that the solutes undergo electron transfer to cyclohexane radical cations. Charge-transfer rate constants were estimated and their observed correlation with the difference of the liquid-phase ionization potentials of solvent and solute, Δ<em>E</em> =<em>I</em><sup>1</sup><sub>C6H12</sub> -<em>I</em><sup>1</sup><sub>S</sub>, is qualitatively compared with electron transfer theories.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 5","pages":"Pages 499-503"},"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)90199-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53761559","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: 14
The contribution of radiation chemistry to enact the hygienic safety standard of irradiated food 辐射化学对制定辐照食品卫生安全标准的贡献
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90264-X
Wu Jilan, Ha Hongfei, Yuan Rongyao
{"title":"The contribution of radiation chemistry to enact the hygienic safety standard of irradiated food","authors":"Wu Jilan,&nbsp;Ha Hongfei,&nbsp;Yuan Rongyao","doi":"10.1016/0146-5724(85)90264-X","DOIUrl":"10.1016/0146-5724(85)90264-X","url":null,"abstract":"<div><p>In order to accelerate the process of omitting the labeling of the irradiated food, it is suggested to enact the hygienic safety standard of the irradiated food. It may be classified as three classes: (1) Its hygienic safety standard is similar to that of common food. (2) The maximum permissible quantities of harmful compounds induced by radiation must be controlled. (3) The quantity of unique radiolysis product may be determined.</p><p>We must put the stress on the prediction and detection of induced harmful radiolysis products such as peroxides, volatile basic nitrogen compounds and organic halides.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 195-199"},"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)90264-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53763903","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
Radiation chemistry of Na3IrCl6 solutions: Catalysed H2 formation by radicals and postirradiation reduction of IrCl3-6 by propanol-2 Na3IrCl6溶液的辐射化学:自由基催化H2生成和辐射后丙醇-2还原IrCl3-6
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90227-4
German Mills, Arnim Henglein
{"title":"Radiation chemistry of Na3IrCl6 solutions: Catalysed H2 formation by radicals and postirradiation reduction of IrCl3-6 by propanol-2","authors":"German Mills,&nbsp;Arnim Henglein","doi":"10.1016/0146-5724(85)90227-4","DOIUrl":"10.1016/0146-5724(85)90227-4","url":null,"abstract":"<div><p>1-Hydroxy-1-methyl ethyl radicals produced in the irradiation of Na<sub>3</sub>IrCl<sub>6</sub> solutions containing propanol-2 and acetone react very slowly with the IrCl<sup>3-</sup><sub>6</sub> anion (<em>k</em> of the order 100 M<sup>-1</sup> s<sup>-1</sup>). The product of the reaction is a compound which reacts very efficiently with the radicals and thereby catalyses the formation of hydrogen. This compound is supposed to be an iridium hydride. No iridium is produced at small Na<sub>3</sub>IrCl<sub>6</sub> concentrations and a maximum H<sub>2</sub> yield of 3.7 H<sub>2</sub>/100 eV is observed at concentrations of IrCl<sup>3-</sup><sub>6</sub> between 2 and 5 times 10<sup>-4</sup> M. At higher concentrations, iridium metal starts to be formed. A faster formation of iridium occurs in solutions of Na<sub>3</sub>IrCl<sub>6</sub>(&gt;10<sup>-3</sup> M) containing only propanol-2 as additive. In these solutions, the reduction of IrCl<sup>3-</sup><sub>6</sub> takes place thermally after initiation with λ radiation (some 10<sup>4</sup> rads). The postirradiation effect is inhibited by O<sub>2</sub>, N<sub>2</sub>O, CH<sub>3</sub>I, CH<sub>2</sub>CHCN, H<sub>2</sub> and CO. A mechanism for the reduction of IrCl<sup>3-</sup><sub>6</sub> by propanol-2 is proposed, in which an Ir<sup>I</sup> complex produced by radiation acts as the catalyst.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 4","pages":"Pages 391-399"},"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)90227-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53763144","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
The isothermal luminescence of γ-irradiated poly(methyl methacrylate) in the presence of aromatic hydrocarbons at 77 K γ辐照聚甲基丙烯酸甲酯在77 K时芳烃存在下的等温发光
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90182-7
I Zuchowicz, J Mayer, J Kroh
{"title":"The isothermal luminescence of γ-irradiated poly(methyl methacrylate) in the presence of aromatic hydrocarbons at 77 K","authors":"I Zuchowicz,&nbsp;J Mayer,&nbsp;J Kroh","doi":"10.1016/0146-5724(85)90182-7","DOIUrl":"10.1016/0146-5724(85)90182-7","url":null,"abstract":"<div><p>ITL spectra of γ-irradiated pure PMMA and PMMA matrices containing anthracene, pyrene, and naphthalene were studied at 77 K. Luminescence was found to be formed as a result of recombination of PMMA<sup>+</sup> and aromatic cations with anionic species. The process occurs according to tunnelling mechanism.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 2","pages":"Pages 173-178"},"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)90182-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53761069","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
Low dose-rate radiolysis of nitrogen: Yield of nitrogen atoms, N(4S) and N(2D,2P) 低剂量率氮的放射性分解:氮原子N(4S)和N(2D,2P)的产率
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90035-4
R.Glen Macdonald, Orval A. Miller
{"title":"Low dose-rate radiolysis of nitrogen: Yield of nitrogen atoms, N(4S) and N(2D,2P)","authors":"R.Glen Macdonald,&nbsp;Orval A. Miller","doi":"10.1016/0146-5724(85)90035-4","DOIUrl":"10.1016/0146-5724(85)90035-4","url":null,"abstract":"<div><p>The low-dose radiolysis of N<sub>2</sub>-O<sub>2</sub> mixtures has been investigated at 101 kPa and 299 K. Measurement of the yield for NO and NO<sub>2</sub> as a function of the N<sub>2</sub> mole fraction has been analyzed to give a <em>G</em>(N) value of 7.3 ± 1.5 for the yield of N(<sup>4</sup>S) and N(<sup>2</sup>D,<sup>2</sup>P) atoms for the radiolysis of N<sub>2</sub>. Computer simulation of the neutral N<sub>2</sub>O<sub>2</sub> chemistry under radiolytic conditions showed that N atoms are predominately formed in a metastable state. Predissociation of N<sub>2</sub> electronic states in the 12 to 16 eV range is responsible for the production of metastable atomic N(<sup>2</sup>D) and N(<sup>2</sup>P) atoms.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 1","pages":"Pages 63-72"},"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)90035-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53754029","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
Tunneling recombination luminescence of glassy polyethylene adipate γ-irradiated at low temperature and effect of electron scavengers 低温辐照下玻璃态己二酸聚乙烯γ-隧穿复合发光及电子清除剂的影响
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90066-4
Kazuo Gouda, Yoshimasa Hama
{"title":"Tunneling recombination luminescence of glassy polyethylene adipate γ-irradiated at low temperature and effect of electron scavengers","authors":"Kazuo Gouda,&nbsp;Yoshimasa Hama","doi":"10.1016/0146-5724(85)90066-4","DOIUrl":"10.1016/0146-5724(85)90066-4","url":null,"abstract":"<div><p>The isothermal luminescence (ITL) from glassy polyethylene adipate (PEA) γ-irradiated at 77 K was observed over a long period of time, together with effect of the electron scavengers on it. The decay behavior of ITL is similar to that of polyethylene terephthalate or polycrystalline PEA obtained previously, so that the decay obeys the decay function <em>I</em>(<em>t</em>) = <em>I</em><sub>0</sub>/(1 + <em>αt</em>)<sup><em>m</em></sup>. The detailed discussion on the parameters included in the decay function is given. Differences in the parameters between different materials or different physical states are found not to be very large, except the parameter <em>I</em><sub>0</sub>. Addition of biphenyl into PEA enhances considerably the intensity of ITL and causes the luminescence center to exchange from the ester cation into the biphenyl cation. In the biphenyl doped PEA, the possibility of the triplet-triplet energy transfer from the excited ester group to the biphenyl and the positive charge transfer from the ester cation to the biphenyl are shown.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 3","pages":"Pages 285-294"},"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)90066-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53754631","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
Radiolysis of aqueous solution of cyanide ion 氰化物离子水溶液的放射性溶解
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90223-7
Qi Shengchu, Wu Jilan
{"title":"Radiolysis of aqueous solution of cyanide ion","authors":"Qi Shengchu,&nbsp;Wu Jilan","doi":"10.1016/0146-5724(85)90223-7","DOIUrl":"https://doi.org/10.1016/0146-5724(85)90223-7","url":null,"abstract":"<div><p>The yields of the radiolytic products in air, N<sub>2</sub> and N<sub>2</sub>O saturated aqueous solution of cyanide ion have been determined by combining the paper chromatographic method and carrier technique. The variations of the yields of the products in various systems have been investigated systematically by the scavenger method. The reaction kinetics of active species (OH, e<sup>-</sup><sub>aq</sub> and H) with HCN and CN<sup>-</sup> has been investigated. The <em>G</em> values of radiolytic products originating from different pathway of reactions were determined. The possibility of increasing the yields of amino acids has also been studied, and a method of increasing the <em>G</em> value of glycine has been found</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 4","pages":"Pages 365-371"},"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)90223-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137409681","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
Application of nanosecond electron pulses to determine electrical properties of semiconductors 纳秒级电子脉冲测定半导体电性能的应用
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0146-5724(85)90163-3
J.W. Leonhardt, R. Goeldner, J. Boes, R. Mehnert
{"title":"Application of nanosecond electron pulses to determine electrical properties of semiconductors","authors":"J.W. Leonhardt,&nbsp;R. Goeldner,&nbsp;J. Boes,&nbsp;R. Mehnert","doi":"10.1016/0146-5724(85)90163-3","DOIUrl":"10.1016/0146-5724(85)90163-3","url":null,"abstract":"<div><p>p<sup>+</sup>-i-n<sup>+</sup>-diodes were irradiated by means of 10 ns-electron pulses with energies of 0.3 - 1 MeV. The induced current pulse was measured. The half times of growth and decay give information about electrical carrier life times and diffusion lengths.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 821-826"},"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)90163-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"112006728","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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