论文部分内容阅读
介绍了利用γ谱仪测量绝对中子注量率的方法。在已知中子场中照射金 (Au)箔和铕 (Eu)箔 ,利用γ谱仪分别测量198Au和152 Eu的 4 11keVγ峰面积 ,根据两者的峰面积之比和已知中子场的绝对中子注量率 ,求得152 Eu的 4 11keVγ峰面积对应的中子注量率。在待测中子场中 ,照射金箔 ,利用γ谱仪测量其 4 11keVγ峰面积和刻度过的152 Eu的 4 11keVγ峰面积 ,根据两者之比和已求得的152 Eu的 4 11keVγ峰面积对应的中子注量率 ,确定出待测中子场的中子注量率。该方法避免了不同γ谱仪对能量响应、探测效率和几何条件不同带来的误差。该方法测量结果与其它方法测量结果一致。
The method of measuring absolute neutron fluence rate by γ spectrometer is introduced. In the known neutron field, gold (Eu) foil and europium (Eu) foil were irradiated. The 4 11 keVγ peak areas of 198Au and 152 Eu were measured by γ spectrometer. According to the peak area ratio and the known neutron field Of the absolute neutron fluence rate, obtained 152 Eu 4 11keVγ peak area corresponding to the neutron fluence rate. In the neutron field to be measured, the gold foil is irradiated, the 4 11 keVγ peak area of the measured 152 Eu and the 4 11 keVγ peak area of the measured 152 Eu are measured by a γ spectrometer, The corresponding neutron fluence rate determines the neutron fluence rate of the neutron field to be measured. The method avoids the error caused by different γ-ray spectrometers on energy response, detection efficiency and geometric conditions. The method of measurement results and other methods of measurement results.