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Baruah, Sudarshan
Greifswald Univ. (Germany). Mathematisch-Naturwissenschaftliche Fakultaet2008
Greifswald Univ. (Germany). Mathematisch-Naturwissenschaftliche Fakultaet2008
AbstractAbstract
[en] The rapid neutron-capture or the r-process is responsible for the origin of about half of the neutron-rich atomic nuclei in the universe heavier than iron. For the calculation of the abundances of those nuclei, atomic masses are required as one of the input parameters with very high precision. In the present work, the masses of the neutron rich Zn isotopes (A=71 to 81) lying in the r-process path have been measured in the ISOLTRAP experiment at ISOLDE/CERN. The mass of 81Zn has been measured directly for the rst time. The half-lives of the nuclides ranged from 46.5 h (72Zn) down to 290 ms (81Zn). In case of all the nuclides, the relative mass uncertainty (Δm=m) achieved was in the order of 10-8 corresponding to a 100-fold improvement in precision over previous measurements. (orig.)
Primary Subject
Source
Jul 2008; 123 p; Diss. (Dr.rer.nat.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation; Numerical Data
Report Number
Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DATA, DAYS LIVING RADIOISOTOPES, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, EVOLUTION, HOURS LIVING RADIOISOTOPES, INFORMATION, INTERMEDIATE MASS NUCLEI, ISOTOPES, MASS, MILLISECONDS LIVING RADIOISOTOPES, MINUTES LIVING RADIOISOTOPES, NUCLEI, NUMERICAL DATA, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, STAR EVOLUTION, ZINC ISOTOPES
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AbstractAbstract
No abstract available
Primary Subject
Source
Berman, B.L. (ed.); California Univ., Livermore (USA). Lawrence Livermore Lab; p. 187-188; 1973
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Report
Literature Type
Conference
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AbstractAbstract
[en] A parametrization of the MNDO method for the Zn atom is proposed. Calculations are performed for zinc-containing molecules and simple complexes. It is shown that the use of the parameters found in this study leads to more accurate estimates of enthalpies of formation of zinc compounds that can be obtained in MNDO calculations with Dewar's parameters. From a comparison of results of the calculations with experimental values and with data obtained in ab initio calculations, it is concluded that the MNDO method can be used in investigating various physicochemical properties of Zn compounds
Secondary Subject
Source
Translated from Zh. Strukt. Khim.; 28: No. 5, 20-24(Sep-Oct 1987). Cover-to-cover translation of Zhurnal Strukturnoj Khimii (USSR).
Record Type
Journal Article
Literature Type
Translation
Journal
Journal of Structural Chemistry (English Translation); ISSN 0022-4766;
; CODEN JSTCA; v. 28(5); p. 649-652

Country of publication
BROMIDES, BROMINE COMPOUNDS, CHALCOGENIDES, CHLORIDES, CHLORINE COMPOUNDS, COMPLEXES, ELEMENTS, ENERGY, ENTHALPY, FLUORIDES, FLUORINE COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, HYDRIDES, HYDROGEN COMPOUNDS, IODIDES, IODINE COMPOUNDS, MATHEMATICAL MODELS, MECHANICS, METALS, ORGANIC COMPOUNDS, OXIDES, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, REACTION HEAT, SULFIDES, SULFUR COMPOUNDS, THERMODYNAMIC PROPERTIES
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AbstractAbstract
[en] High-precision mass measurements on neutron-rich zinc isotopes 71m,72-81Zn have been performed with the Penning trap mass spectrometer ISOLTRAP. For the first time, the mass of 81Zn has been experimentally determined. This makes 80Zn the first of the few major waiting points along the path of the astrophysical rapid neutron-capture process where neutron-separation energy and neutron-capture Q-value are determined experimentally. The astrophysical conditions required for this waiting point and its associated abundance signatures to occur in r-process models can now be mapped precisely. The measurements also confirm the robustness of the N=50 shell closure for Z=30
Primary Subject
Source
(c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
BARYON REACTIONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BINDING ENERGY, DAYS LIVING RADIOISOTOPES, ENERGY, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, EVOLUTION, HADRON REACTIONS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, ISOTOPES, MEASURING INSTRUMENTS, MILLISECONDS LIVING RADIOISOTOPES, MINUTES LIVING RADIOISOTOPES, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, PHYSICS, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPECTROMETERS, STAR EVOLUTION, ZINC ISOTOPES
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AbstractAbstract
[en] Isotope effects for zinc upon complex formation with dicyclohexano-18-crown-6 were investigated. The single stage separation factor for unit mass difference (α = 1.013) was great compared with that of calcium isotopes. One of the isotopes, 67Zn, showed a larger isotope effect than the other isotopes of even mass number. 7 refs., 1 fig
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Secondary Subject
Record Type
Journal Article
Journal
Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CHLORIDES, CHLORINE COMPOUNDS, COBALT ISOTOPES, COOLING SYSTEMS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HALIDES, HALOGEN COMPOUNDS, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MINUTES LIVING RADIOISOTOPES, NUCLEI, ODD-ODD NUCLEI, ORGANIC COMPOUNDS, ORGANIC OXYGEN COMPOUNDS, RADIOISOTOPES, REACTOR COMPONENTS, REACTOR COOLING SYSTEMS, STABLE ISOTOPES, YEARS LIVING RADIOISOTOPES, ZINC COMPOUNDS, ZINC HALIDES
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AbstractAbstract
[en] A new method, based on the simultaneous action of electron-beam zone melting with accelerated electrons with that of a pulse current, is suggested to enrich metals in stable isotopes. This technique makes it possible to obtain, in a relatively short time (several hours), a metal enriched up to 10% in individual isotopes; the metal being obtained in monocrystal form due to the use of the zone melting method. It is expected that the method may be suitable for manufactoring semiconductor materials of a modified ratio of stable isotopes. (author)
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Record Type
Journal Article
Journal
Physica Status Solidi. A, Applied Research; ISSN 0031-8965;
; v. 48(1); p. 229-234

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AbstractAbstract
No abstract available
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Source
Jahrestagung und Fruehjahrstagung des Fachverbandes Physik der Hadronen und Kerne der Deutschen Physikalischen Gesellschaft (DPG) 2006; Muenchen (Germany); 20-24 Mar 2006; 2006 annual and spring meeting of the Fachverband Physik der Hadronen und Kerne of the Deutsche Physikalische Gesellschaft (DPG); Muenchen (Germany); 20-24 Mar 2006; Also available online: http://www.dpg-tagungen.de
Record Type
Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; CODEN VDPEAZ; v. 41(3); [1 p.]

Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DAYS LIVING RADIOISOTOPES, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MILLISECONDS LIVING RADIOISOTOPES, MINUTES LIVING RADIOISOTOPES, NUCLEI, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, TIN ISOTOPES, ZINC ISOTOPES
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External URLExternal URL
AbstractAbstract
No abstract available
Primary Subject
Source
2001 spring meeting of Fachverband Physik der Hadronen und Kerne (HK) of Deutsche Physikalische Gesellschaft e.V. (DGP) with physics and book exhibition; Fruehjahrstagung 2001 des Fachverbandes Physik der Hadronen und Kerne (HK) der Deutschen Physikalischen Gesellschaft e.V. (DPG) mit Physik- und Buchausstellung; Erlangen (Germany); 19-23 Mar 2001
Record Type
Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; CODEN VDPEAZ; v. 36(2); p. 56-57

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Lund, E.; Aleklett, K.; Fogelberg, B.; Sangariyavanish, A.
Atomic masses and fundamental constants1984
Atomic masses and fundamental constants1984
AbstractAbstract
[en] The present investigation involves improved measurements of the Qsub(β)-values of 75-78Zn and determinations of the total decay energies of sup(79,80)Zn which are not reported in the literature before. Also 81Zn was detected but at the time for the experiment the ion-source was not efficient enough to yield sufficient activity for an accurate Qsub(β)-determination. (orig./HSI)
Primary Subject
Source
Klepper, O. (ed.); Gesellschaft fuer Schwerionenforschung m.b.H., Darmstadt (Germany, F.R.); Technische Hochschule Darmstadt. Schriftenreihe Wissenschaft und Technik; v. 26; 756 p; ISBN 3-88607-036-0;
; 1984; p. 102-111; 7. international conference on atomic masses and fundamental constants (AMCO-7); Seeheim-Jugenheim (Germany, F.R.); 3-7 Sep 1984

Record Type
Miscellaneous
Literature Type
Conference; Numerical Data
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Country of publication
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Alenezi, Mohammad R., E-mail: mr.alenezi@paaet.edu.kw2018
AbstractAbstract
[en] Highlights: • Rationally controlled multistage hydrothermal method to produce hierarchical ZnO nanorings with high surface-to-volume ratios and more exposed polar facets. • Hierarchical ZnO nanorings are produced by growing secondary nanowires on initial mono-morphological nanodisks. • Hierarchical ZnO nanorings show more enhanced performance as gas sensor. - Abstract: Morphology controlled hydrothermal synthesis techniques have been realised to produce hierarchical zinc oxide (ZnO) nanostructures with high surface-to-volume ratios and more exposed polar facets. Hierarchical ZnO nanorings (HNRs) were produced by growing secondary nanowires (NWs) on initial mono-morphological nanodisks (NDs). In the two steps of growth process, zinc sulphate and zinc nitrate were used as the source of zinc ions, respectively. In comparison with NWs and NDs, the grown HNRs showed more enhanced performance as gas sensors. HNRs were substantially sensitive and faster in responding to acetone. This high performance in gas sensing is due to the increased surface-to-volume ratio and small size of the NW building blocks as well as the increased proportion of (0 0 0 1) polar facets. This work represents a guide to structure induced improvement of sensing properties by controlling the morphology of nanostructures.
Primary Subject
Source
S0921510718300692; Available from http://dx.doi.org/10.1016/j.mseb.2018.11.011; Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Materials Science and Engineering. B, Solid-State Materials for Advanced Technology; ISSN 0921-5107;
; CODEN MSBTEK; v. 236-237; p. 132-138

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