3MeV中子诱发~(238)U裂变的质量分布

DISTRIBUTION OF FISSION YIELDS IN THE 3.0 MeV NEUTRON-INDUCED FISSION OF 238U

摘要: 本文叙述了用放化法和Ge(Li)直接γ能谱法测量3MeV中子诱发~(238)U裂变的裂变产额。测得了38个核素的产额值,其中9个核素的产额尚未见文献报道。用实验值描绘出的质量-产额曲线下的总产额为200.2％。在重峰A=134处存在精细结构峰,在轻峰A=101-103处观测到一小峰。
- 裂变产额 /
- 质量分布 /
- 精细结构
Abstract: The fission yields of 38 mass chains are measured using radiochemical method as well as direct Ge (Li) γ spectrometry. The fission yields are reported for the first time for mass chains 85, 87, 88, 101, 125, 128, 138, 153 and 161. The yields measured make up 114.4% of the total 200% expected from fiission. A fine structure exists at A = 134 and a small fine structure at A = 101-103. Under the light and heavy peak the total yields are both 100.1%. The peak widths taken at half maximum are 16.7 and 15.8 mass units, and the average mass numbers are 97.5 and 139.3 for the light and heavy peak respectively. The ratio of peak to valley is 179 (99Mo/115A).
- Fission yield /
- Mass distribution /
- Fine structure

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