@article{MaP, author = {Bui Loat and Le Anh and Nguyen Quan and Dinh Thin and Nguyen Tam}, title = { The measurements of uranium enrichment by using X rays and gamma rays below 100 keV}, journal = {VNU Journal of Science: Mathematics - Physics}, volume = {28}, number = {2}, year = {2012}, keywords = {}, abstract = {Abstract. In this work the non-destructive gamma - spectroscopic method for determination of uranium enrichment is presented. The method is applicable to material of any physical form and geometrical shape, and does not require the use of reference materials or the use of efficiency calibrated geometry. The X Rays and gamma rays below 100 keVfrom 235U were used to determine their relative detection efficiency internally. The activity ratios of 234U/235U and U238/U235in studied sample were calculated based on the measurents of the count rate of 53.2keV (0.123%) gamma ray of 234U and 92.6 keV (5.16%) of 234Th, a daughter of 238U.  As a test of this method, a highly enriched uraniumsample was measured. The obtained result was in agreement with the estimated value.Keywords: Uranium enrichment, gamma-spectrometry, intrinsic efficiency calibration, MGA method.}, issn = {2588-1124}, url = {https://js.vnu.edu.vn/MaP/article/view/950} }