<sup>252</sup>Cf源驱动噪声分析法测量<EM>α</EM>初步研究

²⁵²Cf源驱动噪声分析法测量α初步研究

1.
China Academy of Engineering Physics, P. O. Box 919-210, Mianyang 621900, China
2.
School of Communication & Information Engineering, University of Electronics Science and Technology of China, Chengdu 610054, China

摘要: 在一球形浓缩铀临界装置上，采用²⁵²Cf源驱动噪声分析方法对其次缓发临界状态下的α进行测量，在频域内分析数据得到α。对比频域内的两种数据处理方式（功率谱实虚部相除方法和功率谱取模直接拟合方法），用互功率谱密度函数实虚部相除方法得到在-0.1 $情况下，脉冲堆的α为0.58 μs^-1，与Rossi-α方法的结果相吻合。
- 瞬发中子衰减常数 ,
- 噪声分析 ,
- 功率谱
Abstract: Measurements for prompt neutron decay constant α were conducted with a highly enriched uranium spherical shell using ²⁵²Cf source driven noise analysis method, which could interpret data in the frequency domain. In these measurements carried out at a slightly subcritical state, two methods of interpreting data were compared. The value for a reactivity of -0.1 $ subcritical obtained by the ratio of the real to the imaginary part of the cross power spectral density with a resulting value 0.58 μs^-1 agrees with the Rossi-α result.
- prompt neutron decay constant ,
- noise analysis ,
- power spectral density

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