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  • 1
    Electronic Resource
    Electronic Resource
    Identification of the new isotope 241Bk (2003)
    Springer
    The European physical journal 16 (2003), S. 17-19 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 23.20.Lv Gamma transitions and level energies – 23.40.-s Beta decay; double beta decay; electron and muon capture – 27.90.+b A ≥ 220
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A new neutron-deficient berkelium isotope 241Bk produced in the 239Pu(6Li, 4n) reaction has been identified using a gas-jet coupled on-line isotope separator. Cm K and L X-rays associated with the EC decay of 241Bk were observed in the mass-241 fraction, and three γ transitions were attributed to the EC decay of 241Bk through X-γ coincidences. The half-life of 241Bk was determined to be 4.6±0.4 min which is 1/2-1/4 of that of theoretical predictions. The half-life value and the observed γ transitions can be consistently explained as a consequence of the allowed EC transition of π7/2+[633] → ν7/2+[624].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/i2002-10112-y
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  • 2
    Electronic Resource
    Electronic Resource
    New isotope 233Am (2000)
    Springer
    The European physical journal 9 (2000), S. 303-305 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 23.60.+e α-decay – 27.90.+b 220 ? A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The new neutron-deficient americium isotope 233Am produced via the 233U( 6Li, 6n) reaction has been identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. The α-decay of 233Am and its subsequent α-decay chain have been observed in the mass-233 fraction. The half-life and α-particle energy of 233Am have been determined to be 3.2±0.8 min and 6780±17 keV, respectively. From these results and a deduced α-decay branching ratio, the observed α-decay is regarded as a favored transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070013
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of240Pu/239Pu ratio by fission track method and inductively coupled plasma mass spectrometry (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 136 (1989), S. 353-362 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Fission track /FT/ method and inductively coupled plasma mass spectrometry /ICP-MS/, that is a new analytical technique for the analysis of trace element, were used for the measurement of240Pu/239Pu ratios in environmental samples. The results obtained by both methods are in agreement within the relative deviation of 9–13%. The precision in ICP-MS was found to be better than in it the FT-method. These methods are applicable to measure the Pu isotopes ratio at low concentration levels in environmental samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164727
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of archaeological samples by the internal monostandard method of PGAA (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 234 (1998), S. 27-32 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Nondestructive determination of major and trace elements within voluminous materials has been demonstrated by prompt γ-ray neutron activation analysis. Some fragmented pieces of pottery bowls considered to have been produced in the late 18th century were analyzed by a new internal monostandard method, and noticeable differences of the elemental contents and significant correlations of the elemental distributions were observed among the samples. The possibility of identification of producing areas of unearthened material is demonstrated by the analytical results and the applicability of this method to the investigation of precious samples in a completely nondestructive way is verified in practice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389742
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  • 5
    Electronic Resource
    Electronic Resource
    Some Basic Studies on Non-Destructive Elemental Analysis of Bulky Samples by PGAA (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 405-411 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An internal monostandard method for PGAA is proposed for completely non-destructive analysis of elements in bulky samples by the use of a neutron beam guided out from the reactor. The method is essentially the same as the k 0 method except that it corrects for the change of relative γ-ray counting efficiencies caused by the absorption and scattering of neutrons and absorption of γ-rays within the sample. Some examples of applications to archaeological samples of earthen wares, bronze mirrors, and to voluminous meteorite samples are demonstrated, and its future application to the in-situ studies of distribution and metabolism of a certain elements in animals is also explained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006752129650
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  • 6
    Electronic Resource
    Electronic Resource
    Recoil properties of radionuclides formed in the photonuclear reactions onnatCu at intermediate energies (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 133-138 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The recoil properties of 26 radionuclides produced in the photonuclear reactions on Cu at bremsstrahlung end-point energies (E 0) of 250 to 1000 MeV have been investigated using the thick-target thick-catcher method. Kinematic properties of the product nuclei were calculated by the two-step vector velocity model. The calculated mean kinetic energies,T, of product nuclei increase with increase of the mass difference between products and target, reflecting the resonance natures and absorption mechanisms. TheT atE 0≥600 MeV were well reproduced by a calculation performed by PICA code byGabriel andAlsmiller atE 0=400 MeV, except for (γ,xn) products by giant-resonance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349544
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  • 7
    Electronic Resource
    Electronic Resource
    Prompt gamma-ray analysis (PGA) of meteorite samples, with emphasis on the determination of Si (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 577-580 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Neutron-induced prompt gamma-ray analysis (PGA) was applied to seven meteorite samples (Allende, Zagami, Acfer 209, ALH77005, ALH84001, EET79001 and Neagari). Samples were irradiated in both the thermal neutron and the cold neutron guided beams of JRR-3M at JAERI. Multiple samples of an Allende standard powder were analyzed for Si using two different methods: (1) the comparison method, using a Si standard, and (2) the mono-standard method, using Fe as an internal reference element. The Si concentrations determined by these two methods are in good agreement with literature values. The analytical sensitivity for Si using the cold neutron guided beam is∼14.3× higher than that for the thermal neutron guided beam. Other elements determined (B, Ca, Ti and S) also showed higher sensitivities using the cold neutron beam. The other meteorites studied showed some anomalous B and S values likely due to the effects of terrestrial weathering/contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349072
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  • 8
    Electronic Resource
    Electronic Resource
    Neutron and photon activation analyses of twenty four GSJ and six KIER rock reference samples (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 215 (1997), S. 69-76 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Fifteen GSJ (Geological Survey of Japan) and six KIER (Korean Institute of Energy and Resources; now Korean Institute of Geology, Mining and Materials, KIGAM) “igneous rock series” and nine GSJ “sedimentary rock series” reference samples were analysed for 21–29 elements by neutron and/or photon activation analysis (NAA and PAA); 14 MeV-NAA for Si and Al, fission track method for U, radiochemical and instrumental NAA for rare earth elements, with reactor neutrons for the latter two. Instrumental neutron and photon AA for the remaining elements were performed with reactor neutrons and bremsstrahlung of end-point energy of 30 MeV, respectively. The reactor irradiations were performed at core sites and also a thermal column of the Kyoto University Research Reactor. All of the radioassays were performed by γ-ray spectrometry with HPGe-detectors. The present results from the different types of irradiation are compared and discussed in terms of elemental abundances and rock types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02109880
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  • 9
    Electronic Resource
    Electronic Resource
    How Effectively is the Photon Activation Analysis Applied to Meteorite Samples? (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 491-496 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Chondritic meteorite samples were analyzed nondestructively by photon activation analysis. Powdered samples weighing about 50 mg each were irradiated with photons (γ-rays) converted from electrons accelerated by a linear electron accelerator at 20 and 30 MeV. With 30-minute and 6-hour irradiations, 11 and 12 elements with duplication of 6 elements could be determined, respectively. Considering that several major elements including Mg, Si and Fe can be determined in addition to Ti, Rb, Sr, Y and Zr, which cannot or hardly be determined by instrumental neutron activation analysis (INAA) with rather high sensitivity, instrumental photon activation analysis is as effective as INAA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006766411304
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  • 10
    Electronic Resource
    Electronic Resource
    Two deformation paths in fission of light actinides (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 97-101 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The correlation among the fission threshold energy, the scission configuration and the mass yield distribution has been studied in proton-induced fission of light actinides. It was found that there exist at least two fission paths from the threshold region to the scission. The elongated scission configuration is related with the fission process that goes over a higher threshold energy and results in a symmetric mass division mode, while the compact scission configuration with the process that experiences a lower threshold and ends up with an asymmetric mass division mode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349537
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