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  • 1
    Electronic Resource
    Electronic Resource
    SL(3,R) as the group of symmetry transformations for all one-dimensional linear systems. III. Equivalent Lagrangian formalisms (1992)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 33 (1992), S. 1571-1578 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The SL(3,R) theory of projective transformations of the plane is applied to the Lagrangians of all one-dimensional Newtonian linear systems. Noether and non-Noether equivalent Lagrangians, as well as the associated Noether and non-Noether constants of motion, are thus obtained in a completely general and systematic way. Complete unification is achieved by this group-theoretic approach to Lagrangians of one-dimensional linear systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.529681
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  • 2
    Electronic Resource
    Electronic Resource
    ^2^4Na and ^9^9^mTc tracers applied to the characterization of liquid-solid fluidized bed and hydraulic transport reactors
    Amsterdam : Elsevier
    The @International Journal Of Applied Radiation And Isotopes 34 (1983), S. 1465-1468 
    Details
    ISSN: 0020-708X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-708X(83)90048-0
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  • 3
    Electronic Resource
    Electronic Resource
    Heavy ions activation analysis: Theoretical approach for optimizing cyclic analyses
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 10-11 (1985), S. 1062-1064 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(85)90171-5
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  • 4
    Electronic Resource
    Electronic Resource
    The growth curve of animals
    Amsterdam : Elsevier
    Agricultural Systems 10 (1983), S. 133-147 
    Details
    ISSN: 0308-521X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0308-521X(83)90066-5
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  • 5
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 90 (1985), S. 349-354 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Both7Li and10B induced radioactivation were applied to trace determination of hydrogen via the1H(7Li,n)7Be and1H(10B, α)7Be reactions. In both cases, boron and magnesium present nuclear interferences, but their extent does not exceed 0.5%. At the bombarding energies used, 21 MeV7Li++ and 27 MeV10B++ the detection limits are respectively 2 and 0.5 ppm for an iron matrix irradiated for two hours. Due to the recoil of7Be, the samples were carefully prepared to avoid superficial hydrogen contamination. A series of samples which hydrogen content ranges from 15 to 120 ppm was examined, and the results obtained with the two beams were compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060791
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  • 6
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 88 (1985), S. 369-377 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 7Li induced radioactivation was used for the trace determination of hydrogen via the1H(7Li, n)7 Be reaction. At 21 MeV7Li, only boron and magnesium present small nuclear interferences. An activation curve has been established by bombarding a stack of thin mylar foils. The comparison of this curve with the excitation function for the forward reaction, namely7Li(p, n)7 Be, shows that the recoil range from the superficial hydrogen atoms is only 1.7 mg·cm−2, allowing post-irradiation etching. Hydrogen has been determined in titanium and lead bronze at the 100 ppm level with a relative precision of 6 to 10%. Studies of 32 potential interfering elements suggest the extension of Li activation to the trace determination of Na[23Na(7Li,6Li)24Na] and K[39K(7Li, d)44m,44Sc].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037013
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  • 7
    Electronic Resource
    Electronic Resource
    Trace determination of beryllium by heavy ion activation analysis (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 119 (1987), S. 477-487 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A novel procedure for measuring the concentration of trace beryllium in different samples has been studied using11B heavy ion activation analysis. The specific reaction,9Be/11B, 2n/18F, is sensitive and selective when using a 10 MeV11Be3+ bombardment energy. The detection limit for a nondestructive analysis is 0.1 ng for a 2 h irradiation in a μA cm−2 beam current. A precision of 12% was achieved at the 50 μg g−1 level. Beryllium has been determined in a standard beryllium-copper alloy NBS-SRM C1123. Glass samples containing up to 61 trace elements were also analyzed nondestructively. When using a clean vacuum irradiation chamber, the technique might allow ultra-trace determinations, dealing with solid samples of a few milligrams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261210
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  • 8
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 122 (1988), S. 115-128 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 15N induced radioactivation was used to study the possible trace determination of light elements with 1≤Z≤17. 55 nuclear reactions were investigated with ion beam energies ranging from E1ab=10 MeV to E1ab=30 MeV. Three elements were found to be determinable non-destructively, selectively and sensitively: Li, Be and Mg. Nuclear interferences have also been defined and quantified. The technique has been tested by analyzing NBS standards. Finally, Li and Be have been determined in glass samples and Mg in various types of alumina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037170
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  • 9
    Electronic Resource
    Electronic Resource
    Trace determination of silicon by heavy ion activation analysis (1984)
    Springer
    Journal of radioanalytical and nuclear chemistry 84 (1984), S. 355-361 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Si(11B, x)34mCl and Si(19F, x)44mSc reactions have been studied in order to work out their capabilities in determining traces of silicon. The first one has been tested with beam energies ranging from 19 to 27 MeV11B; only Mg and Al have shown nuclear interferences and a 30-min 27 MeV11B irradiation yields a 14 ng detection limit. The second reaction, investigated in between 35 and 46 MeV19F, yields a 16 ng detection limit with a 2 hrs 46 MeV19F irradiation; at that energy only Al and P present nuclear interferences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036975
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  • 10
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis trace determination possibilities with9Be bombardment (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 116 (1987), S. 401-408 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 9Be induced radioactivation was used to study the trace determination of 19 elements at 3 different ion beam energies (Elab=14, 32 and 63 MeV9Be2+). Nine nuclear reactions, yielding radionuclides with half-lives longer than 2.5 m, present potential analytical features. Beside the very sensitive detection of B and N, the multielemental determination of Na, Si, Ca, Sc, and Zn is possible with a9Be ion beam of appropriate incident energy. Nuclear interferences have also been investigated and quantified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035784
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