Prompt γ rays from the spontaneous fission of ²⁵²Cf were measured with cerium-doped LaBr₃ detectors. The average prompt fission γ-ray multiplicity, $M_{\gamma }$, was determined as a function of fragment mass number (A) and total kinetic energy (TKE). High-statistics data, obtained from three detectors of different size at different angles relative to the fission chamber, confirms unequivocally a saw-tooth like shape of the γ multiplicity as a function of fragment mass, in contrast to previously published data. In addition, the TKE-dependence of $M_{\gamma }$ was determined experimentally and compared with recent data.

中文翻译：

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瞬变裂变γ射线多重性对质量和TKE的依赖性的实验信息

用掺铈的LaBr ₃探测器测量了自发裂变²⁵² Cf产生的迅速γ射线。平均瞬变裂变γ射线多重性，${\mathrm{中号}}_{\gamma }$，被确定为碎片质量数（A）和总动能（TKE）的函数。从三个大小不同的探测器以相对于裂变室的不同角度获得的高统计数据清楚地证实了γ多重性的锯齿状形状是碎片质量的函数，这与以前发表的数据相反。此外，TKE的依赖${\mathrm{中号}}_{\gamma }$ 通过实验确定，并与最新数据进行比较。