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        Activation method combined with characteristic X-ray counting : A possibility to measure (alpha, gamma) cross sections on heavy p-nuclei

        Author
        Kiss, G. G.
        Szuecs, T.
        Gyuerky, Gy.
        Fueloep, Zs.
        Farkas, J.
        Kertesz, Zs.
        Somorjai, E.
        Laubenstein, M.
        Froehlich, C.
        Rauscher, T.
        Attention
        2299/10391
        Abstract
        For an improved modeling of the astrophysical nucleosynthesis of p-nuclei, low energy cross section data of alpha-induced reactions on heavy isotopes are needed. Technical difficulties hamper the experimental determination of these cross sections, therefore the relevant experimental data are almost completely missing. Here we present a new method for the cross section measurements, the activation technique based on the detection of characteristic X-ray radiation. The feasibility of the method is illustrated through the measurement of the Tm-169(alpha, gamma)Lu-173 and Tm-169(alpha, n)Lu-172 reaction cross sections. Despite the relatively long half-life of the reaction products (T-1/2 = 500 and 6.7 days, respectively) it was possible to measure the cross section of the Tm-169(alpha, gamma)Lu-173 reaction between E-c.m. = 13.16 and 17.08 MeV. The Tm-169(alpha, n)Lu-172 reaction cross section was derived from close above the threshold up to E-c.m.. = 17.08 MeV. Details of the new method and the experimental results are presented. (C) 2011 Elsevier B.V. All rights reserved.
        Publication date
        2011-10-01
        Published in
        Nuclear Physics A
        Published version
        https://doi.org/10.1016/j.nuclphysa.2011.07.003
        Other links
        http://hdl.handle.net/2299/10391
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