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  • 11
    Electronic Resource
    Electronic Resource
    New α-decaying neutron deficient isotopes197Rn and200Fr (1995)
    Springer
    The European physical journal 352 (1995), S. 7-8 
    Details
    ISSN: 1434-601X
    Keywords: 23.60.+e ; 25.70.−z ; 27.80.+w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New neutron-deficient isotopes,197Rn,197mRn, and200Fr have been produced and identified on the basis of genetic correlations in the166Er(36Ar,5n)197Rn (Elab=186, 200 MeV), and169Tm(36Ar,5n)200Fr (Elab=186 MeV) reactions. The evaporation residues were separated from the beam by using a gas-filled recoil separator and implanted onto a position-sensitive solid-state detector. The α-decay energies (half-lives) of197Rn,197mRn and200Fr have been determined to be 7261±30 keV (51 −15 +35 ms), 7370±30 keV (18 −5 +9 ms), and 7500±3O keV, (570 −140 +270 ms), respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292753
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  • 12
    Electronic Resource
    Electronic Resource
    Studies on strongly damped components in relatively light heavy ion reaction systems (1984)
    Springer
    The European physical journal 317 (1984), S. 31-44 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Strongly damped components have been studied in relatively light heavy ion reaction systems;20Ne(E lab=93, 120 and 146MeV)+50Cr,20Ne(E lab=146MeV)+54Cr and20Ne(E lab=146MeV)+92Mo,100Mo. The kinetic energy, angular and charge distributions have been observed for those products. The yields of symmetric-mass-splitting products for20Ne+50Cr were found about three times larger than those for20Ne+54Cr. There was also observed a similar difference in the cross sections of the symmetric-mass-splitting products between20Ne+92Mo and20Ne+100Mo reactions. In order to explain the bombarding energy dependence of the cross sections of symmetric-mass-splitting products by the transport theory, it was found necessary to assume that the mean life of the composite nucleus was dependent on the bombarding energy. However, the target isotope dependence of the cross sections could not be explained by such an assumption. They could be partly explained by fission calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01420446
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  • 13
    Electronic Resource
    Electronic Resource
    Activation and tracer techniques for study of metallofullerenes (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 192 (1995), S. 81-89 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Advantages and uniqueness of radiochemical techniques in fullerene studies are pointed out. Some experimental data are presented on metallofullerenes production yields, HPLC elution behaviors of Y, La, Gd containing fullerenes, encapsulation of a new metal in the carbon cage, stability of the carbon cage against recoil energy, and the distribution of metallofullerenes among various organs of rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037739
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  • 14
    Electronic Resource
    Electronic Resource
    Stability of radio-metallofullerenes against beta-decay (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 179-185 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The effect of β−-decay on the stability of metallofullerenes was investigated for three decay chains of155Sm-155Eu,161Gd-161Tb and177Yb-177Lu. For the former two cases, the metallofullerenes were found stable even after the β−-decay while in the case of177Yb, the metallofullerene became unstable after β−-decay. The present results point to the fact that metallofullerenes are stable against ordinary β−-decay unstable after β−-decay. The present results point to the fact that metallofullerenes are stable against ordinary β−-decay recoil energies, but they become unstable if the oxidation state of the metal atom is changed by nuclear transformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349553
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  • 15
    Electronic Resource
    Electronic Resource
    Electronic state of Ce@C82 (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 187-190 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Time-differential perturbed angular correlation method was applied to Ce@C82 in order to investigate the electronic properties of the encaged Ce atom. The nuclear quadrupole frequency of the nuclear spin of the Ce was successfully determined as ωQ = 6.5(3)·107 rad/s, which is much greater than what has already been estimated for Ce4+ and La3+ in other compounds. By comparing the present value with the values for the Ce4+ and La3+, it was inferred that the valence state of the encaged Ce atom is trivalent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349554
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  • 16
    Electronic Resource
    Electronic Resource
    Stability of metallofullerenes following neutron capture reaction on the metal ion (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 234 (1998), S. 95-100 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The stability of 16 kinds of metallofullerenes (9 elements) was investigated against the recoil phenomena associated with the capture of neutrons by the metal atoms inside the carbon cages. The yields of the unaffected species were obtained by use of the HPLC separation method and radioactivity measurements. Recoil energy distributions of the metal atoms were calculated theoretically and the effective energy required for destruction of metallofullerenes from inside by recoiling atoms was estimated to be about 10 to 15 eV for the metallofullerenes containing lanthanide atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02389754
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  • 17
    Electronic Resource
    Electronic Resource
    Direct synthesis of radioactive carbon labeled fullerences using nuclear reactions (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 201-206 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The11C and14C labeled fullerenes were produced by charged-particle and neutron irradiation, of C60, C70 and their mixture. It was found that a carbon atom of fullerence can be easily exchanged with a radioactive carbon atom produced by a nuclear reaction. The HPLC method was effective for identification and purification of various labeled fullerene families as chemically stable compounds. The radiochemically interesting aspect of the results is not only the production of11C and14C labeled fullerenes but also the formation of radioactive higher fullerenes which can be simultaneously produced with high yield and in carrier-free form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349557
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  • 18
    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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  • 19
    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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  • 20
    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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