Počet záznamů: 1  

Formation of the high-spin Hf-179m2 isomer in reactor irradiations

  1. 1.
    0105619 - UJF-V 20043187 RIV US eng J - Článek v odborném periodiku
    Karamian, S. A. - Carroll, J. J. - Adam, Jindřich - Kulagin, EN. - Shabalin, EP.
    Formation of the high-spin Hf-179m2 isomer in reactor irradiations.
    [Vytváření vysocespinového izomeru Hf-179m2 ozařováními v reaktoru.]
    Laser Physics. Roč. 14, č. 4 (2004), s. 438-441. ISSN 1054-660X. E-ISSN 1555-6611
    Grant CEP: GA MŠk(CZ) ME 134
    Klíčová slova: reactor irradiation * high-spin Hf-179m2
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 0.836, rok: 2004

    The second isomer (T-1/2 = 25.1 d) in Hf-179 is one of a number of nuclear states that is interesting from the point of view of triggering a release of "clean" nuclear energy because it stores a specific energy of about 0.5 MJ/mg. The yield of this isomer in nuclear reactions is restricted due to its high spin, I-pi = 25/2(-). The productivity of previously known methods was enough for the creation of experimental amounts but not for potential applications. In this paper, we show that irradiations in a reactor by the fast neutron flux within the fission spectrum are useful for the accumulation of Hf-179m2 in an amount of 10(16) nuclei. In an experiment performed in the Dubna IBR-2 reactor, the yield, cross-section sigma(m), and isomer-to-ground state ratio sigma(m)/sigma(g) were measured for the Hf-179(n, n,gamma)Hf-179m2 reaction. The systematics of the sigma(m)/sigma(g) values deduced from the experimental data available for this isomer are discussed.

    V experimentu uskutečněném na dubněnském reaktoru IBR-2 jsou měřeny výtěžky , účinné průřezy a poměry izomer-základní stav pro reakce Hf-179(n, n gama)-Hf179m.
    Trvalý link: http://hdl.handle.net/11104/0012853

     
     
Počet záznamů: 1  

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