Abstract The 50Cr(n,2n)49Cr, 52Cr(n,2n)51Cr, 52Cr(n,p)52V, 55Mn(n,2n)54Mn, 55Mn(n,α)52V and 55Mn(n,γ)56Mn reaction cross sections at the neutron energy of 14.54 ± 0.24 MeV were measured by using activation method along with off-line γ-ray spectrometry. The 27Al(n,p)27Mg monitor reaction was used for the 52Cr(n,p)52V and 55Mn(n,α)52V reactions, whereas the 197Au(n,γ)198Au monitor reaction for the 55Mn(n,γ)56Mn reaction. The 27Al(n,α)24Na monitor reaction was used for other three reactions. The neutron beam was generated from the T(d,n)4He reaction using the Purnima neutron generator at BARC, Mumbai. The covariance analysis for the uncertainties of reaction cross sections was performed by considering the correlations between different attributes. The present results were compared with the literature data, evaluated data of ENDF, ROSFOND, CENDL, JENDL and JEFF libraries as well as with the theoretical values based on TALYS-1.9 calculation.

中文翻译：

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用协方差分析测量 14.54 MeV 中子诱导反应截面的 Cr 和 Mn

摘要 50Cr(n,2n)49Cr、52Cr(n,2n)51Cr、52Cr(n,p)52V、55Mn(n,2n)54Mn、55Mn(n,α)52V和55Mn(n,γ)56Mn反应中子能量为 14.54 ± 0.24 MeV 时的横截面使用活化法和离线 γ 射线光谱法测量。27Al(n,p)27Mg 监测反应用于 52Cr(n,p)52V 和 55Mn(n,α)52V 反应，而 197Au(n,γ)198Au 监测反应用于 55Mn(n,γ) 56Mn反应。27Al(n,α)24Na 监测反应用于其他三个反应。中子束是使用孟买 BARC 的 Purnima 中子发生器从 T(d,n)4He 反应产生的。通过考虑不同属性之间的相关性，对反应截面的不确定性进行协方差分析。将本结果与文献资料、ENDF、ROSFOND、CENDL、