Experimental Study of the Prompt Neutron Spectra of ²³⁸U Fission Induced by Fast Neutrons

• 来源期刊: 原子核物理：英文版
• 学科: 物理学
• 关键词: FISSION NEUTRON SPECTRUM TOF technique ²³⁸U
• 年，卷（期）: 1994,（3）
• 页码范围: 255-262
• 页数: 8页
• 分类号: O4

摘要

【正】 The prompt neutron spectra of ²³⁸U fission induced by 10.17 and 12.12 MeVneutrons have been measured using a multi-segment fission chamber and two ST-451liquid scintillator neutron detectors in conjunction with a double-TOF technique.Use ofcoincidence between the fission fragments and neutrons enables the fission neutrons tobe distinguished from other secondary ones.The measured spectra can be roughly des-cribed by Maxwellian distributions.The Maxwellian temperatures obtained by fittingare 1.40±0.04 MeV and 1.47±0.04 MeV for 10.17 MeV and 12.12 MeV incidentneutron energies,respectively.They are compared with theoretical calculations by codeFINESSE and the evaluation by ENDF/B-Ⅵ.