摘要
In this paper a technique for determining ^235U abundance is described. After chemical separation, uranium-rich ore (a compound of uranium with chemical and radioactive pure)is made into U3O8 by burning at 850℃, and then the U3O8 is prepared as the radioactive measuring source with a definite weight and shape. The measurement is carried out of the net area of 185.7 keV γ -ray peak of ^235U by Ge (Li) γ -ray spectrometer, with the mixture of a number of primary uranium ores as normal abundance standard. Parallel analysis and counting are performed on the standard and samples with the same method. The abundance of ^235U will be known by comparing their net areas of 185.7 keV γ ray peaks of ^235U both in the samples and the standard. Two samples of uranium ore from China which are suspected to be anomalous in U abundance and one sample from Oklo natural reactor have been determined. The precision of the method is better than 1%.
In this paper a technique for determining ^(235)U abundance is described. After chemicalseparation, uranium-rich ore (a compound of uranium with chemical and radioactive pure)is made into U_3O_8 by burning at 850℃, and then the U_3O_8 is prepared as the radioactivemeasuring source with a definite weight and shape. The measurement is carried out of the netarea of 185.7 keV γ-ray peak of ^(235)U by Ge (Li) γ-ray spectrometer, with the mixture ofa number of primary uranium ores as normal abundance standard. Parallel analysis and coun-ting are performed on the standard and samples with the same method. The abundance of ^(235)U will be known by comparing their net areas of 185.7 keV γ-raypeaks of ^(235)U both in the samples and the standard. Two samples of uranium ore from Chi-na which are suspected to be anomalous in U abundance and one sample from Oklo naturalreactor have been determined. The precision of the method is better than 1%.
出处
《地球化学》
CAS
1983年第4期357-363,共7页
Geochimica
