<p>Neutron in-beam Mössbauer spectroscopy employing the <sup>56</sup>Fe(<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\text{n}, \gamma\)</EquationSource> </InlineEquation>)<sup>57</sup>Fe* reaction, which had been suspended after the Great East Japan Earthquake in 2011, was resumed following the restart of research reactors of JRR-3 in Tokai, Japan. In-beam Mössbauer spectra following neutron capture for <sup>57</sup>Fe were recorded for stainless-steel and high-purity <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\alpha\)</EquationSource> </InlineEquation>-iron foils. Concurrently, the elemental composition of the stainless-steel sample was quantified by prompt <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\gamma\)</EquationSource> </InlineEquation> -ray neutron activation analysis (PGNAA). The resonance absorption rate of the 14&#xa0;keV <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\gamma\)</EquationSource> </InlineEquation> -rays emitted after neutron capture was calculated, and the peak-to-background ratio of the measured Mössbauer spectra was evaluated to assess spectral quality.</p>

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In-beam Mössbauer spectroscopy using the neutron capture reaction of 56Fe

  • M. Yoshida,
  • S. Kimoto,
  • M. K. Kubo,
  • Y. Kobayashi,
  • M. Mihara,
  • W. Sato,
  • J. Miyazaki,
  • Y. Watanabe,
  • J. Nakamura,
  • I.-H. Chiu,
  • T. Osawa

摘要

Neutron in-beam Mössbauer spectroscopy employing the 56Fe( \(\text{n}, \gamma\) )57Fe* reaction, which had been suspended after the Great East Japan Earthquake in 2011, was resumed following the restart of research reactors of JRR-3 in Tokai, Japan. In-beam Mössbauer spectra following neutron capture for 57Fe were recorded for stainless-steel and high-purity \(\alpha\) -iron foils. Concurrently, the elemental composition of the stainless-steel sample was quantified by prompt \(\gamma\) -ray neutron activation analysis (PGNAA). The resonance absorption rate of the 14 keV \(\gamma\) -rays emitted after neutron capture was calculated, and the peak-to-background ratio of the measured Mössbauer spectra was evaluated to assess spectral quality.