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

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

Reaction of hydrogen atoms with hydroxide ions to give solvated electrons 氢原子与氢氧根离子发生反应，产生溶剂化电子

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90088-7

Martyn C.R. Symons, Donald N. Zimmerman

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

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

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

An E.S.R. investigation of scavenging yields in a γ-irradiated ethylene glycol-water glass at 77 K 77 K下γ辐照乙二醇-水玻璃清除率的esr研究

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90003-6

O. Kaalhus, J. Moan

引用次数: 2

Some studies on the formation of excited states of aromatic solutes in hydrocarbons and other solvents 芳香族溶质在碳氢化合物和其他溶剂中激发态形成的一些研究

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90057-7

G. Arthur Salmon

引用次数: 16

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

Excitation transfer in the radiolysis of alkanes in the solid phase at 77 K 77 K固相辐射分解烷烃的激发转移

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90060-7

Tetsuo Miyazaki

{"title":"Excitation transfer in the radiolysis of alkanes in the solid phase at 77 K","authors":"Tetsuo Miyazaki","doi":"10.1016/0020-7055(76)90060-7","DOIUrl":"10.1016/0020-7055(76)90060-7","url":null,"abstract":"<div>The role of excited molecules and excitation transfer in the radiolysis of solid alkanes at 77 K is described. Studies of the effect of electron scavengers in the radiolysis of solid alkanes show that hydrogen formation is mainly due to a nonionic process. Though the yield of hydrogen in the radiolysis of solid isobutane at 77 K is not affected by the addition of N2O or SF6, it decreases sharply upon the addition of CCl4. Similarly, the yield of C4H9 radical in the radiolysis of isobutane at 77 K is not changed by the presence of conventional electron scavengers; however, it decreases remarkably upon the addition of CCl4 or toluene. When 2,3-dimethylbutane (23DMB) containing a small amount of toluene (To) is irradiated with γ-rays or nanosecond pulses of X-rays in the solid phase at 77 K, luminescence from excited toluene is observed. The emission spectrum from 23DMB-To (2 mol%)-N2O(2 mol%) during γ-irradiation at 77 K is similar to that from 23DMB-To (2 mol%) during U.V.-illumination. The formation of the singlet-excited toluene is not affected by the addition of electron scavengers and hole scavengers. These results are explained by excitation transfer from alkane to additives. The possibility of exciton migration in the radiolysis of solid alkanes is discussed by a simple theoretical treatment.</div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 1","pages":"Pages 57-70"},"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)90060-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80747161","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

γ-radiolysis of myo-inositol hexasulphate (free acid) in aqueous solution 六硫酸肌醇(游离酸)在水溶液中的γ-辐射分解

International Journal for Radiation Physics and Chemistry Pub Date : 1976-01-01 DOI: 10.1016/0020-7055(76)90021-8

M. Balakrishnan, W.J. Criddle, B.J. Jones

引用次数: 1