International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry最新文献_第3页

A Monte Carlo calculation of subexcitation and vibrationally-relaxing electron spectra in irradiated liquid water 辐照液态水中亚激发和振动弛豫电子能谱的蒙特卡罗计算

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90229-9

V. Cobut , Y. Frongillo , J.-P. Jay-Gerin , J.-P. Patau

引用次数: 3

Early steps of formation of silver/polyacrylate complexed oligomer clusters. A pulse radiolysis study 银/聚丙烯酸酯络合低聚物簇形成的早期步骤。脉冲辐射溶解研究

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90208-W

M. Mostafavi, M.O. Delcourt, N. Keghouche, G. Picq

{"title":"Early steps of formation of silver/polyacrylate complexed oligomer clusters. A pulse radiolysis study","authors":"M. Mostafavi, M.O. Delcourt, N. Keghouche, G. Picq","doi":"10.1016/1359-0197(92)90208-W","DOIUrl":"10.1016/1359-0197(92)90208-W","url":null,"abstract":"<div>Pulse radiolysis has been carried out on aqueous solutions of silver ions complexed with polycrylate (PA). Over the time scale 10−8−10 s, only a few kinetic steps have been observed which have been identified through spectroscopic and kinetic analysis. The reaction rate of e-aq with Ag+ is lowered in the presence of PA (3.6×109lmol−1s−1 when [PA]/[Ag+]=100). The first products (Ag0 λmax≈360 nm, Ag+2 λmax=310 nm) are similar to those obtained in the absence of PA, except for an additional absorption band (350–450 nm) which indicates that Ag+2 is itself complexed. Then through dimerization (2k=3×109lmol−1s−1) and reaction with the alcoholic radical (in the presence of 2-PrOH, 1.5×109lmol−1s−1), Ag+2 leads to an “Ag2” species peaking at 300, 320 and 360 nm, noticeably different from the reported Ag2+4 species. Two further steps are observed which are assigned to a ligand reorganization of “Ag2” in the millisecond range (103s−1), followed by a coalescence to “Ag4” in the range of seconds (105lmol−1s−1). This last product is thought to be the stable Aga cluster known to be formed by γ-radiolysis. A kinetic simulation accounts for the whole mechanism which is much lower than in the absence of PA.</div>","PeriodicalId":14262,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry","volume":"40 6","pages":"Pages 445-450"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/1359-0197(92)90208-W","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85924111","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

Protection in radiolysis of n-hexadecane—2. Radiolysis of n-hexadecane in the presence of additives 正十六烷- 2辐射分解的保护作用。添加剂存在下正十六烷的辐射分解

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90209-X

Yanti S. Soebianto , Yosuke Katsumura , Kenkichi Ishigure , Junichi Kubo , Takeo Koizumi

{"title":"Protection in radiolysis of n-hexadecane—2. Radiolysis of n-hexadecane in the presence of additives","authors":"Yanti S. Soebianto , Yosuke Katsumura , Kenkichi Ishigure , Junichi Kubo , Takeo Koizumi","doi":"10.1016/1359-0197(92)90209-X","DOIUrl":"10.1016/1359-0197(92)90209-X","url":null,"abstract":"<div>Protection effect of aromatic (naphthalene, phenanthrene) and hydroaromatic (tetralin, octahydrophenanthrene) compounds in irradiated liquid alkane has been investigated as a model experiment for the radiolysis of polymers. Liquid n-hexadecane has been selected as the model linear amorphous polymer and the protection effect has been studied by analyzing the radiolysis products. In the presence of additives, degradation of n-hexadecane, reduction of radiolysis products, including H2 evolution, and selective degradation of the additive have been observed. Energy transfer (excitation and charge) to the additive reduces the solvent excitation which is the precursor of the radiolysis products. The additive reacts with the solvent molecules according to its reactivity to form adduct compounds. Mass analysis shows that these adduct compounds have a smaller number of double bonds in their aromatic rings due to hydrogenation. Aromatic compounds are more reactive than hydroaromatic compounds towards n-hexadecane and their adducts consume more hydrogen than those of the hydroaromatic compounds, and therefore aromatic compounds reduce gas formation more effectively than hydroaromatic compounds. From the effect of aromatic compounds, it is concluded that hexadecene is produced neither by H2 elimination from the lowest excited state of n-hexadecane nor by disproportionation of n-hexadecyl radicals, but is mainly produced directly from the decomposition of the excited cations of n-hexadecane.</div>","PeriodicalId":14262,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry","volume":"40 6","pages":"Pages 451-459"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/1359-0197(92)90209-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83988578","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

Electron spin resonance of sulfite radicals in irradiated calcite and aragonite 辐照方解石和文石中亚硫酸盐自由基的电子自旋共振

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90211-W

Ayako Kai, Toshikatsu Miki

{"title":"Electron spin resonance of sulfite radicals in irradiated calcite and aragonite","authors":"Ayako Kai, Toshikatsu Miki","doi":"10.1016/1359-0197(92)90211-W","DOIUrl":"10.1016/1359-0197(92)90211-W","url":null,"abstract":"<div>Radiation-induced radicals in sulfite-doped calcite and aragonite were characterized by ESR. Among the many ESR signals produced, only four signals are dependent on the SO2-3 concentration; an axial signal (g⊥=2.0038 and g|=2.0024) in calcite, and an orthorhombic signal (g1=2.0042, g2=2.0038 and g3=2.0025), an isotropic signal (g=2.0034) and an isotropic signal (g=2.0060) in aragonite. The former two signals exhibit hyperfine structures arising from 33S<math><mtext>(I=</mtext><mtext>3</mtext><mtext>2</mtext><mtext>, 0.75%</mtext></math> natural abundance), and are attributed to SO-3 radicals. The isotropic signal at g=2.0034 in aragonite is considered to be due to rotating SO-3 radicals. Rotating or tumbling molecules (probably SO-2) produced by thermal decomposition of SO2-3 seem to be responsible for the isotropic signal at f=2.0060.</div>","PeriodicalId":14262,"journal":{"name":"International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry","volume":"40 6","pages":"Pages 469-476"},"PeriodicalIF":0.0,"publicationDate":"1992-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/1359-0197(92)90211-W","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91551254","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: 32

Wood-plastic composite using water soluble monomer 木塑复合材料采用水溶性单体

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90206-U

Mubarak A. Khan, K.M.Idriss Ali

引用次数: 4

Effects of hydroaromatics on post-oxidation of polyolefins induced by electron irradiation 氢芳烃对聚烯烃电子辐照后氧化反应的影响

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90212-X

Junichi Kubo , Kazushige Otsuhata

引用次数: 0

Role of additives on tensile strength of wood-plastic composite 添加剂对木塑复合材料抗拉强度的影响

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90204-S

Mubarak A. Khan, K.M.Idriss Ali

引用次数: 2

Reactions of hydrated electron and alcohol radicals with halogenated aromatic compounds: A pulse radiolysis study 水合电子和醇自由基与卤代芳香族化合物的反应:脉冲辐射分解研究

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90217-4

H. Mohan , M. Mudaliar , B.S.M. Rao , J.P. Mittal

引用次数: 8

Radiation-induced transmethylation and transsulfuration in the system DNA-methionine 辐射诱导的dna -蛋氨酸系统的转甲基化和转硫化

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-12-01 DOI: 10.1016/1359-0197(92)90205-T

W. Köhnlein , O. Merwitz , P. Ohneseit

引用次数: 0

Charge trapping and migration in irradiated polyethylene film 辐照聚乙烯薄膜中的电荷捕获和迁移

International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry Pub Date : 1992-11-01 DOI: 10.1016/1359-0197(92)90200-Y

S. Wysocki , M. Mienska , J. Kroh

引用次数: 0