摘要
应用裂变反冲法和中子活化分析法测定了热中子诱发２３５Ｕ裂变中１３５Ｃｓ的裂变产额。主要研究内容包括：２３５Ｕ靶的制备；反冲捕集装置的设计加工；用Ａｕ作为中子监测器监测１３５Ｃｓ活化时的中子注量率；１３７Ｃｓ和１３６Ｃｓ的放化分离和测量。以１３７Ｃｓ的裂变产额为标准得到１３５Ｃｓ的裂变产额值为（６．３４±０．４６）％。
The fission yield of 135 Cs in the thermal neutron fission of 235 U is measured accurately by a neutron activation analysis in which the fission fragments are recoiled to a Al catcher.The preparation of 235 U targets and the recoil catcher assembly,determination of neutron flux by Au flux monitor,radiochemical separation and detection of 136 Cs and 137 Cs are studied.The fission yield of 135 Cs is obtained to be (6.34±0.46)% with the fission yield of 137 Cs as standard.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1998年第3期129-137,共9页
Journal of Nuclear and Radiochemistry
基金
核工业科学基金
