Proton energy determination using activated yttrium foils and ionization chambers for activity assay

MA Avila-Rodriguez, Johan Rajander, Jan-Olof Lill, K. Gagnon, J. Schlesinger, JS Wilson, SA McQuarrie, Olof Solin

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    Abstract

    Excitation functions of the (89)Y(p,xn) nuclear reactions were measured up to 18 MeV by the conventional activation method using the stacked-foil technique, and the irradiation of single foils. Activity assays of the irradiated foils were performed via ionization chamber and gamma spectroscopy methods. Activity ratios of the activation products were measured in two different facilities and evaluated for use as a practical and simple method for proton energy determinations. Cross section values measured in this work were compared with published data and with theoretical values as determined by the nuclear reaction model code EMPIRE II. In general, there was a good agreement between the experimental and theoretical values of the cross section data. Activity ratios of the isomeric and ground state of (89)Zr measured via ionization chamber were found to be useful for proton energy determinations in the energy range from 7 to 15 MeV. Proton energies above 13 MeV were accurately determined using the (89g)Zr/(88)Zr and (89g)Zr/(88)Y activity ratios measured via gamma spectroscopy. (C) 2009 Elsevier B.V. All rights reserved.
    Original languageUndefined/Unknown
    Pages (from-to)1867–1872
    Number of pages6
    JournalNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
    Volume267
    Issue number10
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Cyclotrons
    • Ionization chambers
    • Monitor reactions
    • Proton energy determination
    • Yttrium foils

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