Prompt gamma rays induced by (n,n′γ) reactions on iron were measured with the instrument FanGaS (Fast Neutron induced Gamma-Ray Spectrometry) operated at the Heinz Maier-Leibnitz Zentrum (MLZ) in Garching. The measurement was performed at an angle of 90° between neutron beam and detector. The fast neutron flux at the sample position was determined to be 1.40 × 108 cm−2 s−1 by using the foil activation method. Energies, relative intensities and fast neutron spectrum averaged isotopic cross section for production of 81 prompt gamma lines are presented. The results obtained are found in good agreement with literature data. The new set of gamma lines is recommended to replace the old dataset with several new lines also recognizing a few false identifications. This work is an important step towards the future chemical analysis of large samples at FanGaS employing highly penetrating fission neutrons.

中文翻译：

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裂变中子在铁上的非弹性散射引起的瞬发伽马射线

使用在 Garching 的 Heinz Maier-Leibnitz Zentrum (MLZ) 运行的仪器 FanGaS（快中子诱导伽马射线光谱法）测量铁上的 (n,n'γ) 反应诱导的瞬发伽马射线。测量是在中子束和探测器之间成 90° 的角度进行的。通过使用箔激活方法确定样品位置处的快中子通量为 1.40 × 108 cm-2 s-1。提供了用于产生 81 条瞬发伽马线的能量、相对强度和快中子谱平均同位素截面。发现所得结果与文献数据非常吻合。建议使用一组新的伽马线，用几条新的线替换旧的数据集，同时也识别出一些错误的识别。