{"title":"Dr. H. Hering-Biography","authors":"J. Sutton","doi":"10.1016/0020-7055(76)90052-8","DOIUrl":"10.1016/0020-7055(76)90052-8","url":null,"abstract":"","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 1","pages":"Pages v-vi"},"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)90052-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78160209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Gamma and pulse radiolysis of methanolic solutions of triphenylphosphine","authors":"M. Venturi, A. Breccia, F. Busi, Q.G. Mulazzani","doi":"10.1016/0020-7055(76)90039-5","DOIUrl":"10.1016/0020-7055(76)90039-5","url":null,"abstract":"<div><p>In irradiated methanolic solutions of triphenylphosphine (Ph<sub>3</sub>P) deaerated with argon or saturated with N<sub>2</sub>O a transient spectrum has been detected. This spectrum is attributed to Ph<sub>3</sub>PCH<sub>2</sub>OH and a value of <em>k</em><sub>(CH<sub>2</sub>OH+Ph<sub>3</sub>P)</sub> = 8.8 <em>x</em> 10<sup>9</sup><em>mol</em><sup>−1</sup><em>dm</em><sup>3</sup><em>S</em><sup>−</sup> has been detemined. No evidence has been obtained for a reaction between e<sub>sol</sub><sup>−1</sup> and Ph<sub>3</sub>P in methanol.</p><p>The gamma-irradiation of oxygen-saturated methanolic solutions of Ph<sub>3</sub>P have shown that, under these conditions, Ph<sub>3</sub>P is oxidized to Ph<sub>3</sub>PO according to a chain reaction mechanism. The experimental results are in good agreement with the equation for <em>G</em>(-Ph<sub>3</sub>P) = <em>G</em>(Ph<sub>3</sub>PO) obtained by steady-state treatment of the proposed mechanism.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 6","pages":"Pages 673-677"},"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)90039-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78404732","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}
{"title":"Determination of superoxide (O2−) radical anion reaction rates using pulse radiolysis","authors":"C.L. Greenstock, G.W. Ruddock","doi":"10.1016/0020-7055(76)90082-6","DOIUrl":"10.1016/0020-7055(76)90082-6","url":null,"abstract":"<div><p>Pulse radiolysis has been used to measure the rates of reactions of O<sub>2</sub><sup>−</sup> with electron donors and acceptors, either directly or by a competition kinetic method using <em>p</em>-benzoquinone. O<sub>2</sub><sup>−</sup> readily reduces quinones and various redox dyes and enzymes, and oxidizes ascorbate and catecholamines, but is quite unreactive towards aromatic amino acids, nucleic acids, sugars and alcohols.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 3","pages":"Pages 367-369"},"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)90082-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72975884","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}
{"title":"Pulse radiolysis studies on aqueous systems PtCl42−Cl− and PtCl42−Br−","authors":"R.K. Broszkiewicz, J. Grodkowski","doi":"10.1016/0020-7055(76)90081-4","DOIUrl":"10.1016/0020-7055(76)90081-4","url":null,"abstract":"<div><p>Pulse irradiation of PtCl<sub>4</sub><sup>2−</sup> in aqueous solutions containing Cl<sup>−</sup> or Br<sup>−</sup> indicates that oxidation of Pt(II) by OH may be wholly or partially replaced by oxidation by Cl<sub>2</sub><sup>−</sup> or Br<sub>2</sub><sup>−</sup>, depending on the efficiency of OH scavenging by the particular halide ion. The Pt(III) species produced by the latter reactants absorb respectively at 290 and 310 nm and differ from that produced by OH. Contrary to the similar PdCl<sub>4</sub><sup>2−</sup> no evidence of Pt(II) co-ordinating more than four Cl<sup>−</sup> ions has been obtained. The rate constants of the processes and extinction coefficients of the transient species observed are reported.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 3","pages":"Pages 359-365"},"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)90081-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76899776","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}
{"title":"Mobility of the electron in liquid and solid 3-methylpentane","authors":"G.F. Novikov, B.S. Yakovlev","doi":"10.1016/0020-7055(76)90016-4","DOIUrl":"10.1016/0020-7055(76)90016-4","url":null,"abstract":"<div><p>The authors have investigated the current of electrical conductivity <em>I</em> induced by a pulse of 2 × 10<sup>−7</sup> s of high energy electrons in 3-methylpentane (3MP) over the temperature range 94–296 K. The determination of the drift mobility of the excess electron <em>u</em> is based on measurement of the amplitude of <em>I</em> in conditions in which the lifetime of the excess electron in 3MP τ ⪢ 2 × 10<sup>−7</sup> s and the total number of free charges <em>q</em> generated in the course of one pulse. In liquid 3MP <em>q</em> was measured by integrating <em>I</em> and in solid 3MP by integrating the current of thermostimulated conductivity on heating the sample to melting point. At <em>T</em> = 296 K the value <em>u</em> = 0·22 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup> and agrees with the value obtained from measurements of the time of transit by the electron of the distance between electrodes <em>d</em>≈0·1 cm.</p><p>In the temperature interval from 94–296 K the value <em>u</em> monotonically changes from 10<sup>−8</sup> to 0·22 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>. In the region of the melting point, the values of <em>u</em> in liquid and solid 3MP are much the same, whereas the activation energy changes from 0·14 to 0·4 eV on passing from liquid to solid 3MP. The activation energy of the mobility of the electron in solid 3MP is connected with the energy of the thermal release of the electron from the deepest structural traps.</p><p>Extrapolation of the function <em>u(T)</em> by the Arrhenius law with an activation energy of 0·4 eV gives the value <em>u</em> ≈ 10<sup>−15</sup> cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup> at 77 K which accords with the value obtained from measurement of the quasi-steady photo-conductivity and evaluation of the lifetime of the trapped electron in 3MP at 77 K.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 4","pages":"Pages 517-518"},"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)90016-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88749614","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}
{"title":"A pulse radiolysis investigation of 9,10-diphenylanthracene excited state formation in 3-methylpentane at low temperature","authors":"J. Kroh, J. Mayer, J.L. Gȩbicki, J. Grodkowski","doi":"10.1016/0020-7055(76)90005-X","DOIUrl":"https://doi.org/10.1016/0020-7055(76)90005-X","url":null,"abstract":"<div><p>The influence of temperature, down to 87 K, on the formation of excited states in the pulse radiolysis of 10<sup>−3</sup> mol dm<sup>−3</sup> 9,10-diphenylanthracene in 3-methylpentane was investigated. Lowering the temperature decreases the yield of solute singlets and triplets produced during the pulse and extends the time scale of excited state formation up to milliseconds or even seconds. This effect is mainly due to slower ionic reactions at low temperature. The ionic processes are responsible for the formation of about 70% of the solute singlets and all the triplets in pulse-irradiated 10<sup>−3</sup> mol dm<sup>−3</sup> 9,10-diphenylanthracene in 3-methylpentane.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 4","pages":"Pages 433-439"},"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)90005-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91680375","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}
{"title":"Reactions intratrajectories dans la radiolyse de solutions aqueuses par les particules de recul de 10B(n, α)7Li","authors":"J. Pucheault, P. Sigli","doi":"10.1016/0020-7055(76)90031-0","DOIUrl":"10.1016/0020-7055(76)90031-0","url":null,"abstract":"<div><p>A partir des résultats concernant la radiolyse de divers systm̀es de solutés par les particules de recul de <span><math><msup><mi></mi><mn>10</mn></msup><mtext>B</mtext><mtext>(</mtext><mtext>n</mtext><mtext>, α)</mtext><msup><mi></mi><mn>7</mn></msup><mtext>Li</mtext></math></span>, le calcul des rendements radicalaires et moléculaires démontre l'existence de réactions se développant, en absence de bons capteurs, au voisinage immédiat de chaque trajectoire. Une hypothèse est proposée quant à l'origine de ces réactions: les produits moléculaires sortant du coeur des trajectoires pourraient réagir avec les produits radicalaires formés essentiellement dans une zone périphérique par les rayons δ qui dissiperaient ainsi environ 20% de l'énergie des particules <em>α</em>.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 5","pages":"Pages 613-619"},"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)90031-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88028307","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}
{"title":"Scavenging of ions in irradiated organic liquids","authors":"J. Kroh, E. Hankiewicz, J. Piekarska","doi":"10.1016/0020-7055(76)90072-3","DOIUrl":"10.1016/0020-7055(76)90072-3","url":null,"abstract":"<div><p>The kinetics of positive ion and electron scavengin gin certain <em>n</em>-alkanes, cycloalkanes, branched alkanes, aromatic hydrocarbons and in some polar compounds (ethers, dimethyl-formamide) have been investigated.</p><p>The non-homogeneous kinetic approach gives satisfactory agreement with experimental Results for <em>n</em>-hexane, cyclohexane, iso-octane and 2,3-dimethylbutane. Differences between positive ion and electron scavenging for ethers have been observed and ascribed to the complex structure of the corresponding positive ions. For benzene and dimethylformamide the homogeneous kinetic equation gives the best agreement with experimental results.</p><p>Characteristic parameters such as <em>G</em><sub>fi</sub>, <em>G</em><sub>gi</sub>, reactivity coefficients <em>α</em>, rate constant of ion scavenging <em>k</em><sub>s</sub>, geminate recombination parameters for several solvents <em>λ</em>, and the most probable distances of electron thermalization have been determined or calculated.</p><p>The effect of molecular structure on the ionic reactions has been discussed.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 3","pages":"Pages 289-304"},"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)90072-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84508672","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}
{"title":"The pulse radiolysis of aqueous solutions of simple RCN compounds","authors":"I.G. Draganić, Z.D. Draganić, V.M. Marković","doi":"10.1016/0020-7055(76)90077-2","DOIUrl":"10.1016/0020-7055(76)90077-2","url":null,"abstract":"<div><p>Fast kinetic spectrophotometry was used to study the absorption spectra of short-living intermediates produced by reactions of RCN molecules with H, e<sub>aq</sub><sup>−</sup> and OH. The spectra were obtained on the microsecond time scale after an electron pulse from a Febetron 707 accelerator in aqueous solutions of the following compounds: hydrocyanic acid, acetonitrile, propionitrile, malononitrile and succinonitrile. It has been found that all intermediates absorb in the U.V. range (<em>λ</em>⩽300 nm) and disappear by fast bimolecular processes with decay rate constants of about 10<sup>9</sup>dm<sup>3</sup>mol<sup>−1</sup>s<sup>−1</sup>. In the presence of an efficient scavenger for hydroxyl radicals, the same transient spectra were registered in acid and neutral solutions suggesting that the protonations of e<sub>aq</sub><sup>−</sup> adducts of these RCN molecules were complete within a submicrosecond time interval.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 3","pages":"Pages 339-342"},"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)90077-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85105957","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}
{"title":"The mechanism of excited state formation in radiolysis of hydrocarbon liquids","authors":"Lee Walter, Fumio Hirayama , Sanford Lipsky","doi":"10.1016/0020-7055(76)90068-1","DOIUrl":"10.1016/0020-7055(76)90068-1","url":null,"abstract":"<div><p>The fluorescence intensity of bicyclohexyl liquid excited both with β particles and with 184.9 nm light has been studied as a function of the concentration of perfluorocarbon electron scavengers. From this it has been possible to estimate (a) the fraction of all excited singlet states which derive from geminate ion pairs and (b) the probability (averaged over the spur size distribution) that a geminate ion pair will generate an excited singlet state on recombination. The latter value is compared with theoretical values and it is concluded that in bicyclohexyl the geminate electron does not spin-relax prior to recombination. Preliminary results for <em>p</em>-xylene are also presented and important differences between the saturated and aromatic hydrocarbon liquids are discussed.</p></div>","PeriodicalId":100688,"journal":{"name":"International Journal for Radiation Physics and Chemistry","volume":"8 1","pages":"Pages 237-246"},"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)90068-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76359591","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}