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  • Zeeman shift - A tool for assignment of ▫$^{14}$▫N NQR lines of nonequivalent ▫$^{14}$▫N atoms in powder samples
    Lužnik, Janko, 1948-2012 ...
    The use of Zeeman perturbed ▫$^{14}$▫N nuclear quadrupole resonance (NQR) to determine the ▫$\nu_+$▫ and ▫$\nu{-}$▫ ▫$^{14}$▫N lines in polycrystalline samples with several nonequivalent nitrogen ... atoms was investigated. The ▫$^{14}$▫N NQR line shift due to a weak external Zeeman magnetic field was calculated, assuming isotropic distribution of EFG tensor directions. We calculated the broad line distribution of the ▫$\nu_+$▫ and ▫$\nu{-}$▫ line shifts and experimentally confirmed the calculated Zeeman field dependence of singularities (NQR peaks) in cyclotrimethylenetrinitramine (RDX) and aminotetrazole monohydrate (ATMH). The calculated and measured frequency shifts agreed well. The proposed measurement method enabled determination of which ▫$^{14}$N▫ NQR lines in ATMH belong to ▫$\nu_+$▫ and which to ▫$\nu_-$▫ transitions.
    Vir: Journal of magnetic resonance. - ISSN 1090-7807 (Vol. 212, iss. 1, 2011, str. 149-153)
    Vrsta gradiva - članek, sestavni del
    Leto - 2011
    Jezik - angleški
    COBISS.SI-ID - 16000089

    Povezava(-e):

    http://dx.doi.org/10.1016/j.jmr.2011.06.023

vir: Journal of magnetic resonance. - ISSN 1090-7807 (Vol. 212, iss. 1, 2011, str. 149-153)
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