CAJ | 학술논문

利用铀材料γ能谱88～100 keV能区中γ、X射线重峰分解确定同位素丰度的方法，是铀同位素分析商用软件MGAU、MGA＋＋等的核心技术。本文建立了γ、X射线峰形模型，提出了效率拟合因子修正效率的方法，并自行编写了铀富集度分析程序。用 H PGe γ谱仪对两种化学形态、铀富集度范围为1.80％～90.1％的铀样品进行了测量，以验证自编程序的可行性。利用本文所编写的程序分析实验能谱，得到的芯块样品分析结果与标称值的相对偏差小于2％，粉末样品分析结果与标称值的相对偏差小于1％。
이용유재료γ능보88～100 keV능구중γ、X사선중봉분해학정동위소봉도적방법，시유동위소분석상용연건MGAU、MGA＋＋등적핵심기술。본문건립료γ、X사선봉형모형，제출료효솔의합인자수정효솔적방법，병자행편사료유부집도분석정서。용 H PGe γ보의대량충화학형태、유부집도범위위1.80％～90.1％적유양품진행료측량，이험증자편정서적가행성。이용본문소편사적정서분석실험능보，득도적심괴양품분석결과여표칭치적상대편차소우2％，분말양품분석결과여표칭치적상대편차소우1％。
T he method w hich is used to determine uranium enrichment by deconvoluting complex peak clusters in 88-100 keV region of γ/X spectrum of uranium materials is the key technique of some uranium enrichment determination software ,such as MGAU , MGA + + ,etc .According to the basic principle of this method ,a code to analyze the spectrum was written ,in which peak shape model of γ/X ray was built to fit the spec-trum and efficiency fitting factor was developed to make efficiency correction . Two types of uranium samples with enrichment ranging from 1.80% to 90.1% were meas-ured by a HPGe detector and analyzed by the code . For the samples measured , the uranium enrichment was determined with relative deviation of about 2% for pellet and 1% for pow der samples .