Chemical Effects Of Nuclear Transformations Research Articles

Chemical effects of nuclear transformations and possible formation of unknown derivatives with N-phenylquinazolinium structure

Abstract Quinazoline derivatives are well known to have a diverse array of therapeutic activities. Unfortunately, “classic” chemical synthesis does not provide an opportunity for the formation of N-phenyl quaternary 1,3-diazinium compounds. A devised nuclear-chemical method of synthesis based on chemical effects of nuclear transformations enables a new way of the direct nitrogen atom phenylation by the nucleogenic (generated by tritium β-decay) phenyl cations in 1,3-diazines, furnishing, based on our prediction, formation of previously unknown derivatives with N-phenyl quaternary quinazolinium scaffold.

Production of <sup>128</sup>I Atoms through <sup>127</sup>I (n,γ) <sup>128</sup>I Reactions in some Solid Iodocompounds using an (<sup>241</sup>Am-Be) Neutron Source

Present work reports the production of 128I atoms through 127I (n,g) 128I reactions in six iodine containing compounds (viz. NaI, NaIO3, NaIO4, KI, KIO3 and KIO4) in solid state. An 241Am-Be neutron source has been used for the production of 128 I atoms. The radioactivities produced have been measured by a thin end-window G.M. Counter. The irradiation time and counting geometry were constant throughout the present sets of experiments. Results obtained have been analyzed through time-decay analyses. From the decay curves, the half life of 128I has been estimated ~25 minutes. The average zero time activities of 128I from three independent measurements in each of NaI, NaIO3.H2O, NaIO4, KI, KIO3 and KIO4 target, have been found 116 ± 2, 92 ± 4, 88 ± 6, 102 ± 6, 98 ± 1 and 93 ± 5 cpm respectively. It is interesting to note that the activities show a decreasing trend while passing through either from NaI to NaIO4 or from KI to KIO4. Results are attributed to the quantity of 128I produced in a specified volume element and, self absorption and self scattering of radiations within the target compounds studied. Keywords: Iodocompounds; 128I; 241Am-Be neutron source; Chemical effects of nuclear transformation.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i2.6385 J. Sci. Res. 3 (2), 357-366 (2011)

Chemical Effects of Nuclear Transformations in Mixed Crystals 12. Chemical Effects of the 37Cl(n,y)38Cl Nuclear Reaction in K2SnCl6-K2OsBr6 Mixed Crystals

Article Chemical Effects of Nuclear Transformations in Mixed Crystals 12. Chemical Effects of the 37Cl(n,y)38Cl Nuclear Reaction in K2SnCl6-K2OsBr6 Mixed Crystals was published on February 1, 1992 in the journal Radiochimica Acta (volume 56, issue 2).

Chemical Effects of Nuclear Transformations in Mixed Crystals 8. Thermal Annealing of 186Re in Neutron Irradiated K2ReBr6-K2SnCl6 Mixed Crystals. I

Article Chemical Effects of Nuclear Transformations in Mixed Crystals 8. Thermal Annealing of 186Re in Neutron Irradiated K2ReBr6-K2SnCl6 Mixed Crystals. I was published on December 1, 1983 in the journal Radiochimica Acta (volume 34, issue 4).

The chemical effects of nuclear transformation: A simple experiment for a radioisotope course

The irradiation of chromium to produce radioactive 51Cr also introduces students to ion-exchange separation.

Hot-atom reactions

Chemical Effects of Nuclear Transformation in Inorganic Systems. Edited by G. Harbottle and A. G. Maddock. Pp.540. (North-Holland: Amsterdam, London and New York, 1979.) $87.75; Dfl. 180.

An Application of Quadrupole Mass Filter to Charge Spectrometer

The charge spectrometer developed by Snell et al.needed a large amount radioactivity(a few Ci)in order to study chemical effects of nuclear transformations in gases. In this report we have described a highly sensitive charge spectrometer equipped with a quadrupole mass filter to detect ions after nuclear decay. This apparatus could decrease the amount of radioactivity required in each experiment. Tritiated ethanol(CH3CHTOH)and water(T2O)were studied with this charge spectrometer.

Investigations on chemical effects induced by nuclear reactions in organic media: Part II.127I(n, 2n)126I and130mI(I.T.)130I reactions of iodine and 80mBr(I.T.)80Br reactions of bromine in hydrocarbons

Abstract With a view to assess the extent of radiation damage caused in hydrocarbon media by nuclear reactions of halogens and thus understand the physicochemical processes preceding the chemical fixation of the radioactive atom, results are reported of nuclear reactions of iodine [127I(n, 2n)126I and 130mI(I.T.)130I] and bromine [80mBr(I.T.)80Br] in cyclohexane, hexane and heptane. From the extent of scavenger I2 (labelled with 131I) and Br2 (labelled with 82Br) consumed as a result of the nuclear transformations, as monitored by the 121I and 82Br activity in the organic form, the number of scavenger molecules taking part in chemical reactions for every (I.T.) or (n, 2n) reaction have been determined. The values for the iodine and bromine nuclear reactions are 5 × 108 and 2 × 104 molecules respectively. Reaction products like iodocyclohexane, monobromo and dibromo cyclohexane have been identified by gas chromatography. The importance of these results in understanding chemical effects of nuclear transformation has been stressed.

Metal carbonyl chemistry studied with implanted ions

Bombardment of organometallic compounds with radioactive metal ions has been studied with a view to simulating the chemical effects of nuclear transformations; implantation of 4 keV 56Mn+ ions into crystalline Cr(CO)6 gives small yields (<1%) of –Mn(CO)5 and –Mn(CO)4.

Iodine-129 Moessbauer studies of the chemical effects of nuclear transformations in compounds of tellurium

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIodine-129 Moessbauer studies of the chemical effects of nuclear transformations in compounds of telluriumC. H. W. Jones, J. L. Warren, and P. VasudevCite this: J. Phys. Chem. 1971, 75, 18, 2867–2879Publication Date (Print):September 1, 1971Publication History Published online1 May 2002Published inissue 1 September 1971https://doi.org/10.1021/j100687a026RIGHTS & PERMISSIONSArticle Views25Altmetric-Citations13LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts

The chemical effects of nuclear transformations in the alkali chlorides. Part II. Analytical problems with sulphur-35

35 S released in an alkali chloride matrix is present in four chemically distinguishable forms. An analytical procedure enabling one to determine their proportions is described. Evidence is given that the four products, sulphide, thiocyanate, sulphite, and sulphate, separated in the process are derived from four different lattice entities.

Isotope Effects of Iodine Reactions Activated by the Radiative Neutron Capture and Isomeric-Transition Processes in Liquid Hydrocarbons

The organic yields of 130I + 130mI and 128I activated by radiative neutron capture are compared to those of 130I activated by isomeric transition. The organic yields of (n, γ)-activated 130mI + 130I are consistently lower than the (IT) induced organic yields of 130I and (n, γ)-activated 128I. Radiogas-chromatography analysis has indicated the similarity of products, but differences in abundance of the relative product yields of 128I, 130I, and 82Br. Similarities in yields and product distributions between iodine and bromine isomeric-transition induced reactions may indicate that radiohalogens mainly trace their chemical environment. The autoradiation hypothesis appears to be the most satisfactory model to explain the chemical effects of nuclear transformations of halogen atoms in liquid hydrocarbon media.

Chemical Effects of Nuclear Transformations

"Chemical Effects of Nuclear Transformations." Nuclear Science and Engineering, 25(3), pp. 308–309 Additional informationNotes on contributorsA. G. MaddockAbout the Reviewer: Alfred Gavin Maddock, Reader in Radiochemistry at Cambridge University and Fellow of St. Catharine3s College, graduated at Imperial College, London, where his research was supervised by H. J. Emeleus. Sometime after completing his thesis, he was attached to the British equivalent of the Manhattan Project. After nearly four years in Canada, and participation in the founding of the Chalk River and, later, the Harwell laboratories, he returned to Cambridge University. His principal research interests revolve around the chemical effects of nuclear transformation, radiation damage in solids, and the chemistry of the heavy elements, especially protactinium.

Chemical Effects of Nuclear Transformations in Inorganic Solids

Chemical Effects of Nuclear Transformations in Inorganic Solids

Hot Electron Chemistry

Summary Some features of the present position on theories of the chemical effects of nuclear transformation are briefly reviewed. It is suggested that theories based on the transfer of energy by elastic collisions of recoiling atoms are not adequate to explain many of the experimental observations. Instead it is shown that electronic excitation, the transfer of energy between electrons, and the consequent loss of valency bonding or its rearrangement, are likely to be of primary importance for explaining these effects.

Chemical Effects of Nuclear Transformations in the Gas Phase

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical Effects of Nuclear Transformations in the Gas PhaseJ. B. Evans, J. E. Quinlan, M. C. Sauer Jr., and J. E. WillardCite this: J. Phys. Chem. 1958, 62, 11, 1351–1355Publication Date (Print):November 1, 1958Publication History Published online1 May 2002Published inissue 1 November 1958https://doi.org/10.1021/j150569a003RIGHTS & PERMISSIONSArticle Views16Altmetric-Citations5LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (662 KB) Get e-Alerts

Making Labeled Compounds. Chemical Effects of Nuclear Transformations

Making Labeled Compounds. Chemical Effects of Nuclear Transformations