International Journal for Radiation Physics and Chemistry最新文献

The γ-radiolysis of CO2 in packed vessels 填充容器中CO2的γ-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)90029-2

S.M. Ali, P.G. Clay

引用次数: 1

Luminescence enhancement in irradiated polythylene 辐照聚乙烯的发光增强

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90078-4

A. Charlesby, G.P. Owen

引用次数: 16

On electron trapping in crystalline hydrocarbon matrices 晶体碳氢化合物基质中的电子俘获

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90087-5

T. Ichikawa, H. Yoshida

引用次数: 11

Role of excited states in radiolysis of cyclohexane 激发态在环己烷辐射分解中的作用

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90065-6

V. Makarov, L. Polak

引用次数: 4

Radioluminescence of methylcyclohexane in the glassy state 甲基环己烷在玻璃态的放射发光

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90069-3

J. Kroh, R. Leszczyński, J. Mayer

引用次数: 3

Some pulse and gamma radiolysis studies of tyrosine and its glycyl peptides 酪氨酸及其甘酰基肽的脉冲和γ射线溶解研究

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90041-3

K.R. Lynn, J.W. Purdie

{"title":"Some pulse and gamma radiolysis studies of tyrosine and its glycyl peptides","authors":"K.R. Lynn, J.W. Purdie","doi":"10.1016/0020-7055(76)90041-3","DOIUrl":"10.1016/0020-7055(76)90041-3","url":null,"abstract":"<div>The only significant product obtained by gamma irradiation of tyrosine in aqueous solution was 3,4-dihydroxyphenylalanine (dopa). G (dopa) was 1.0 in aerated solution, 0.9 in N2O-saturated solutions, and less than 0.1 in deaerated solution. Pulse irradiation of a N2O-saturated solution gave G (dopa) 0.6. The absorption spectrum of the initial OH adduct had λmax at 300 nm (Gϵ = 16,600) and at 330 nm (Gϵ = 18,000). This adduct decayed to give some phenoxyl radical with λmax at ≈410 nm. The rate of reaction of OH with tyrosine, measured by following formation of the transient, was 6.5±0.3 × 109mol−1 cm3 s−1. Irradiation of the peptides, gly.tyr, tyr.gly, and gly.tyr.gly, gave analogous results; i.e. yields, reaction rates and spectra were all similar strongly suggesting that tyrosine was the main residue attacked. Radiolytic conversion of phenylalanine to tyrosine was examined for comparison. The mechanism of dopa formation is discussed in the light of available results.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 6","pages":"Pages 685-689"},"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)90041-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84556274","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: 33

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 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90066-8

Kozo Hirota, Motoyoshi Hatada, Teiichiro Ogawa

引用次数: 13

Radiation damage in Thallous formate and acetate: Charge-transfer from Thallous ions 甲酸盐和乙酸盐的辐射损伤:甲酸盐离子的电荷转移

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90084-X

Martyn C.R. Symons, Douglas X. West, James G. Wilkinson

引用次数: 4

Kinetic investigations of the radiophotoluminescence of frozen organic compounds. Tunneling mechanism of light emission 冷冻有机化合物的放射光致发光动力学研究。光发射的隧穿机制

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 Epub Date: 2002-10-09 DOI: 10.1016/0020-7055(76)90074-7

V.V. Kulakov, Yu.A. Berlin, V.G. Nikol'skii

{"title":"Kinetic investigations of the radiophotoluminescence of frozen organic compounds. Tunneling mechanism of light emission","authors":"V.V. Kulakov, Yu.A. Berlin, V.G. Nikol'skii","doi":"10.1016/0020-7055(76)90074-7","DOIUrl":"10.1016/0020-7055(76)90074-7","url":null,"abstract":"<div>The main kinetic patterns of the radiophotoluminescence (RPL) of organic substances at 77 K have been studied. It was established that the kinetics of the long-lived RPL component is determined by the sum of two processes: monomolecular, corresponding to the spontaneous deactivation of the charges of the triplet molecules formed on recombination of charges, and quasi-monomolecular the kinetics of which is determined by the recombination of electroncation pairs. For a number of aliphatic substances at radiation doses of more than 1 Mrad it was possible to find quenching of RPL manifest in an appreciable change in the luminescent characteristics. From the experimental findings it may be concluded that the quenching observed is due to the free radicals formed in the course of radiolysis and which are effective electron acceptors. A theoretical model of RPL is proposed based on the concepts of the tunnelling mechanism of charge migration in the irradiated frozen organic substances. In examining the processes of paired recombination of spatially separated charges consideration was given to the role of the processes competing with them for capture of one of the components of the pair (electron) by free radicals. The model satisfactorily explains the experimentally observed hyperbolic character of the decay of the long-lived RPL component, the shortening of the duration of luminescence with a rise in the radiation dose and an absence of the effect of temperature on the kinetics of RPL.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 3","pages":"Pages 313-314, in1-in2, 315-324"},"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)90074-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90433539","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

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