International Journal for Radiation Physics and Chemistry最新文献_第9页

Determination of the characteristics of solvated electrons from optical absorption data 用光学吸收数据测定溶剂化电子的特性

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90008-5

A.M. Brodskiy, A.V. Tsarevskiy

引用次数: 4

Radiation mechanisms—VI.(1) electron addition to tetrahedral phosphorus 辐射机理——六。(1)四面体磷的电子加成

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90007-3

Shuddhodan P. Mishra, Martyn C.R. Symons

引用次数: 3

Ion-molecule reactions in the vapour-phase radiolysis of 1-chloropropane, with cyclohexene as an additive 以环己烯为添加剂的1-氯丙烷气相辐射分解中的离子-分子反应

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90080-2

André Geurts, Jan Ceulemans

引用次数: 2

Formation and role of excited states in radiolysis—A foreword 放射性溶解中激发态的形成和作用——前言

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90055-3

Ajit Singh

引用次数: 0

Luminescence de recombinaison consecutive a la photoionisation d'une solution organique vitreuse-nouvelle methode experimentale 有机玻璃溶液光离子化后的连续复合发光-一种新的实验方法

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90020-6

D. Ceccaldi

{"title":"Luminescence de recombinaison consecutive a la photoionisation d'une solution organique vitreuse-nouvelle methode experimentale","authors":"D. Ceccaldi","doi":"10.1016/0020-7055(76)90020-6","DOIUrl":"10.1016/0020-7055(76)90020-6","url":null,"abstract":"<div>In this paper, we describe a new experimental method which is used to determine the effect of temperature on the mechanisms related to the detrapping of electrons trapped in a glass. The studied samples are organic vitreous solutions of an aromatic molecule (TMPD) inside a non-polar glass (3-MP or MCH). The intensity of the isothermal luminescence (ITL) following the photoionization of the sample at 77K is increased when applying thermal jumps ΔT≲2K (the rise time is ⋍s).A general kinetical theory is used to explain the shapes of the luminescence curves perturbed by thermal jumps. It is shown that the experimental observations can be explained in terms of a slow diffusion of the trapped electrons towards a tunneling detrapping zone. When applying a thermal jump ΔT, the intensity of luminescence is multiplied by X such as: <math><mtext>X = </mtext><mtext>exp</mtext><mtext> </mtext><mtext>ΔT</mtext><mtext>T</mtext><mtext>E</mtext><mtext>kT</mtext><mtext>+ Y</mtext><mtext>1+Y</mtext></math>.This relationship is in good agreement with experience. The thermal detrapping activation energy E and the tunnelling effect ratio Y can be determined through this formula. The shapes of the kinetic curves at T = 77K and T = 77·50K are compared in the case of 3-MP glassy samples (near the glass transition, Tg = 77K). It is concluded that there is a slow diffusion of trapped electrons (as it was already shown); the diffusion activation energy (Ed = 0·65eV) is found to be very close to viscosity activation energy (E = 0·65eV) as given by Willard. This last result seems to support the hypothesis according to which the diffusion of trapped electrons is the consequence of the diffusion of the trapping cavities (at Tg).</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 5","pages":"Pages 539-548"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-7055(76)90020-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73633173","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

Free radicals on photolysis and radiolysis of polystyrene 聚苯乙烯光解和辐射解的自由基研究

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90014-0

S.I. Kuzina, A.I. Mikhailov, V.I. Gol'danskii

引用次数: 16

Thermoluminescence isothermal decay in γ-irradiated CaSO4 : Dy phosphors—kinetics, and distribution of trap depths γ辐照CaSO4: Dy磷的热释光等温衰减动力学及俘获深度分布

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90006-1

O. Fiorella, M. Mangia, E. Oliveri

{"title":"Thermoluminescence isothermal decay in γ-irradiated CaSO4 : Dy phosphors—kinetics, and distribution of trap depths","authors":"O. Fiorella, M. Mangia, E. Oliveri","doi":"10.1016/0020-7055(76)90006-1","DOIUrl":"https://doi.org/10.1016/0020-7055(76)90006-1","url":null,"abstract":"<div>In this paper our experiments on isothermal decay of thermoluminescence of the main peak of CaSO4 : Dy phosphors at various temperatures and 60Co γ doses are described. The decays are not monoexponential; however, as the shape of the decay curves at a same temperature is dose independent, first-order kinetics may be assumed. Consequently, the decay curves at 100 rad are broken down in exponential terms and for each term the decay constant and the related partial light sum are obtained. These results are interpreted, at first, by trying to associate with the peak a multilevel distribution of trap depths; however, the activation energies and the frequency factors for these levels are physically unacceptable. Subsequently, on the hypothesis of a continuous trap distribution, the decay curves are best fitted as a whole; in this way a frequency factor of 3 × 1012 s−1 and a trap distribution with an approximately gaussian main peak centred at about 1 > ṡ37 eV and three other minor peaks are obtained. To check the consistency of the results, a theoretical glow curve is synthesized and a single peak fairly similar to the experimental one emerges.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 4","pages":"Pages 441-447"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-7055(76)90006-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91629348","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

Etude de la radiolyse du pentane normal a 77 K par capture des radicaux apres l'irradiation 通过捕获自由基来研究正常戊烷在77k辐照后的辐射分解

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90086-3

J. Allaert, P. Claes, B. Tilquin

引用次数: 3

Pulse radiolysis of aqueous solutions of tetraphenylphosphonium ions 脉冲辐射解四苯基磷离子水溶液

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90017-6

H. Horii, S. Fujita, T. Mori, S. Taniguchi

{"title":"Pulse radiolysis of aqueous solutions of tetraphenylphosphonium ions","authors":"H. Horii, S. Fujita, T. Mori, S. Taniguchi","doi":"10.1016/0020-7055(76)90017-6","DOIUrl":"10.1016/0020-7055(76)90017-6","url":null,"abstract":"<div>The reactions of tetraphenylphosphonium ion (Ar4P+) with eaq−, H atoms and OH radicals have been investigated. The absorption spectra of three transient species were obtained. Ar4P· radicals formed by the reaction: Ar4P+ + eaq− → Ar4P· have a maximum absorption at 305 nm [ε305 = (9400 ± 300) dm3 mol−1 cm−1] and decays by second-order kinetics with the rate constant 2k = (2·7 ±0·4) × 109 dm3 mol−1 s−1. H atoms and OH radicals form transient adducts to the phenyl groups of the Ar4P+ ion with the rate constants of (1·5 ± 0·3) × 109 dm3 mol−1 s−1 and (3·0±0·3) × 109 dm3 mol−1 s−1, respectively. Both adducts have broad absorption spectra at 300≈380 nm (λmax = 340 nm) with the molar extinction coefficients ε340 = 5400±300 dm3 mol−1 cm−1 for the H adduct and ε340 = 3500±200 dm3 mol−1 cm−1 for the OH adduct.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 4","pages":"Pages 521-522"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-7055(76)90017-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88178588","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

A pulse radiolysis study of electrons in 1-propanol at low temperatures 低温下电子在1-丙醇中的脉冲辐射分解研究

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90032-2

J.H. Baxendale, P.H.G. Sharpe

引用次数: 18