International Journal for Radiation Physics and Chemistry最新文献_第6页

Formation and behavior of excited cations 受激阳离子的形成和行为

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90063-2

Walter S. Koski

引用次数: 0

E.S.R. spectrum for AsF5− fprmed from AsF6− by γ-radiolysis 通过γ-辐射分解从AsF6−得到AsF5−的esr谱

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90034-6

Martyn C.R. Symons

引用次数: 0

Vacuum ultraviolet radiation physics 真空紫外辐射物理学

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90092-9

W.C. Price

引用次数: 0

Radiation mechanisms—XI

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90028-0

Martyn C.R. Symons, Donald N. Zimmerman

{"title":"Radiation mechanisms—XI","authors":"Martyn C.R. Symons, Donald N. Zimmerman","doi":"10.1016/0020-7055(76)90028-0","DOIUrl":"10.1016/0020-7055(76)90028-0","url":null,"abstract":"<div>Exposure of aqueous glasses containing carbonate enriched in 13CO32− gave .OH and et− as major primary products at 77 K, but .CO2− and CȮ3− features together with 13C satellite lines grew strongly on annealing above 77 K. Alkaline solutions gave mainly .O− and et−, but on annealing a new radical, tentatively identified as CȮ43−, was detected. This had E.S.R. parameters comparable with those for 13CȮ3−, but with a smaller anisotropy in both A(13C) and g. This species is thought to result from addition of .O− to CO32−Solutions is methanol (CD3OD) gave mainly D2ĊOD, et−, and .CO23− radicals, but CȮ3− grew in strongly on annealing.Neutral aqueous glasses containing formate ions gave HĊO and ĊO2− in addition to .OH radicals, together with a broad feature tentatively assigned to HĊO22− or HĊO(OH)− radical. These features were better defined in alkali glasses (HĊO22−) and in 6 mol dm−3 sulphuric acid glasses [HĊO(OH)−]. Features for 13CO2− were clearly resolved in the former, but in the acidic glasses a larger 13C hyperfine coupling suggested 13ĊO(OH). The formly radical was also detected in the scidic glasses but not in the alkaline media. The mechanisms of the reactions leading to these intermediates are discussed and compared with those for aqueous nitrite solutions.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 5","pages":"Pages 595-601"},"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)90028-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77117405","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: 3

Low energy electron-impact emission from gases 气体的低能电子冲击发射

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90066-8

K. Hirota, M. Hatada, T. Ogawa

引用次数: 13

A pulse radiolysis investigation of 9,10-diphenylanthracene excited state formation in 3-methylpentane at low temperature 低温下3-甲基戊烷中9,10-二苯基蒽激发态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)90005-X

J. Kroh, J. Mayer, J. Gebicki, J. Grodkowski

引用次数: 11

Radiolysis of aqueous solutions of nitrilotriacetic acid 硝基三乙酸水溶液的辐射分解

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90038-3

S.N. Bhattacharyya, E.V. Srisankar

引用次数: 12

Effect of temperature on the solvated electron in 1-propanol 温度对1-丙醇溶剂化电子的影响

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90045-0

R.S. Dixon, V.J. Lopata, C.R. Roy

{"title":"Effect of temperature on the solvated electron in 1-propanol","authors":"R.S. Dixon, V.J. Lopata, C.R. Roy","doi":"10.1016/0020-7055(76)90045-0","DOIUrl":"10.1016/0020-7055(76)90045-0","url":null,"abstract":"<div>The technique of pulse radiolysis has been used to study the effect of temperature on the solvated electron in 1-propanol. The spectrum of the solvated electron has been measured in the range 140–298 K. The wavelength at maximum absorption, λmax, decreases with decreasing temperature (corresponding to an increase in the energy, Emax) but the spectral width at half height, <math><mtext>ΔE</mtext><msub><mi></mi><mn><mtext>1</mtext><mtext>2</mtext></mn></msub></math>, changes little with temperature. At temperatures above ≈180 K, the formation of the solvated electron is complete at the end of the pulse and its spectrum shows no change in shape with time. Below ≈170 K, the absorption spectrum is time-dependent in both liquid and glassy phases, the changes being attributed to the solvation process. The reaction(s) leading to solvated electron formation following the pulse show an activation energy of 22±2 kJ mol− and the solvated electron decays with an activation energy of 20±2 kJ mol−1. The yield of solvated electrons decreases continuously with decreasing temperature in the range 298-77 K and, at all temperatures studied, is less than the total ionization yield measured by scavenging techniques.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 6","pages":"Pages 707-712"},"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)90045-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87449056","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: 13

Pulsed N.M.R. studies of radiation-induced crosslinking and gel formation in linear polydimethy siloxane 线性聚二甲基硅氧烷辐射诱导交联和凝胶形成的脉冲核磁共振研究

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90022-X

R. Folland, A. Charlesby

{"title":"Pulsed N.M.R. studies of radiation-induced crosslinking and gel formation in linear polydimethy siloxane","authors":"R. Folland, A. Charlesby","doi":"10.1016/0020-7055(76)90022-X","DOIUrl":"10.1016/0020-7055(76)90022-X","url":null,"abstract":"<div>Pulsed N.M.R. measurements of the proton spin-lattice, T1, and spin-spin, T2, relaxation times for γ-irradiated linear polydimethylsiloxane (<math><mtext>M</mtext></math>w = 0.6 × 104) as a function of dose up to 200 Mrad are reported. The dependences of T1 and T2 on dose are discussed in terms of the effects of the introduction of intermolecular crosslinks on the molecular motion. Above the gel point the spin-spin relaxation exhibits a double exponential decay characteristic of two-phase system. This behaviour is attributed to the heterogeneous phase separation of the material into gel and sol fractions. The value of T2 for each phase provides information regarding the differing molecular mobilities of the gel and sol phases and their dependence on radiation dose. The sol fractions determined from the N.M.R. T2 measurements are compared with those obtained using the conventional sol extraction technique and are shown to be reasonable quantitative agreement. The applicability of N.M.R. as a quantitative method for the determination of gel points and gel fractions is demonstrated and discussed.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 5","pages":"Pages 555-562"},"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)90022-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75094698","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: 41

Papers to appear in forthcoming issues 即将出版的论文

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90094-2

引用次数: 0