Measurements report effective total neutron cross section for 52Cr nucleus at 24 keV, suggesting accuracy in neutron data evaluation.
The total neutron cross section for 52Сr nucleus was measured at the neutron energy 24 keV. The measurements were taken using the transmission method of filtered neutrons from reactor horizontal channel and chromium metal sample (enrichment 99.3 % 52Cr, thickness 1.208 · 1023 1/cm2). The optimized content and characteristics of filtered neutron beam with the maximum of basic energy line 24.3 ± 0.8 keV and minimum of impurity energy lines were received using our own calculation code and modern neutron data from evaluated neutron data library JENDL-3.2. The calculated shape of nuclear spectra is shown just as the experimental value of filtered neutron flux from the 8th horizontal channel calculated with the activation of 197Au thin sample. The measured value of 52Cr effective total neutron cross section for 24 keV quasimonoenergetic neutrons - σ tef. = 2.099 ± 0.012 b was compared with known experimental values from CSISRS library and the values calculated with evaluated nuclear data libraries.
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Gritzay et al. (2002) studied this question.
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