| ^95Zr,^140Ba和^147Nd产额的精确测定 |
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| 引用本文： | 李泽,崔安智.^95Zr,^140Ba和^147Nd产额的精确测定[J].核化学与放射化学,1995,17(2):65-72. |
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| 作者姓名： | 李泽 崔安智 |
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| 作者单位： | 中国原子能科学研究院 |
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| 摘 要： | 用ＨＰＧｅ直接γ射线能谱法绝对测定热中子和８ＭｅＶ中子诱发＾２３５Ｕ裂变的＾９５Ｚｒ、＾１４０Ｂａ和＾１４７Ｎｄ的产额。绝对裂变率用双裂变室测定,并首次根据测定＾１９８Ａｕ的γ放射性活度来检验裂变室的效率。同时给出产额的“快热比”,以编评热能值为标准得到８ＭｅＶ点的产额值。结果证明,在８ＭｅＶ能点处,产额值偏离随中子能量变化呈ｅ指数关系。
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| 关 键 词： | 裂变产额 γ能谱法 铀235 锆95 钡140 钕147 |
PRECISE DETERMINATION OF YIELDS OFAND |
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| LIZE,CUI ANZHI,LIU DAMING,LIU YONGHUI,WANG XIUZHI,JING KEXING,TANG PEIJA,YANG YI,ZHANG SHULAN,LI XINHUA,SUN HONGOING,LIU CONGGUI,LI DAMING,ZHANG SHENGDONG,AN XINYU,GUO JINGRU.PRECISE DETERMINATION OF YIELDS OFAND[J].Journal of Nuclear and Radiochemistry,1995,17(2):65-72. |
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| Authors: | LIZE CUI ANZHI LIU DAMING LIU YONGHUI WANG XIUZHI JING KEXING TANG PEIJA YANG YI ZHANG SHULAN LI XINHUA SUN HONGOING LIU CONGGUI LI DAMING ZHANG SHENGDONG AN XINYU GUO JINGRU |
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| Abstract: | Fission yields of and are determinded for the fission of induced by ther-mal and 8 MeV neutrons by HPGe r-ray spectrometry. Absolute fisson rate is monitored with adouble-fission chamber. The efficiency of the fission chamber is checked with absolute determina-tion of activity from(n,r)reaction for the first time.Fission product activities ofirradiated foils are rneasured by HPGe r-ray spectrometry without chemical separation.Timeof flight technique and measurement of the fission ratio of are used to estimated the fis-sion events induced by neutrons of other energies.Ratio of"fast yield"to"thermal yield" is alsoobtaincd precisely because of elimination of some svstematic errors.The ratio and evaluated valueof"thermal yield "are used to get more accurate"fast yield" values. The results document thatthe yield values at 8 MeV energy point deviate from those from exponential function values. |
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| Keywords: | Fission yield ThermaI neutrons 8 Mev neutrons r-ray spectrome-try Precise determination |
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