<sup>56</sup>Fe(n,<i>x</i>nγ)截面的符合测量方法研究

⁵⁶Fe(n,xnγ)截面的符合测量方法研究

摘要: 为降低瞬发γ射线法在测量重裂变核(n,xnγ)截面中的康普顿坪和本底水平，尝试采用符合方法来分析数据。在中国原子能科学研究院600 kV高压倍加器上用两个Clover探测器直接测量⁵⁶Fe(n,xnγ)5个能点的反应截面，然后采用符合技术分析数据，计算1 238.3 keV γ射线截面。此结果与直接方法计算的截面结果基本一致，从而验证了符合测量方法的有效性。

Abstract: When measuring(n,xnγ) partial γ-ray cross section of heavy fissionable nuclei, the technique of coincidence measurement was applied to depress Compton platform and background of energy spectrum. Five energy points of ⁵⁶Fe(n,xnγ) cross sections were measured directly by two Clover detectors on 600 kV Cockcroff-Walton accelerator in CIAE, and then the offline data analysis at 1 238.3 keV was performed by using the coincidence technique. The result is approximately the same as direct measurement result and the availability of the technique of coincidence measurement is proved.