Mass spectrometric determination of 234U/238U ratio with improved precision.
A new mass spectrometric method is proposed for measurement of 234U/238U ratio with a single Daly electron multiplier detector using the general peak jump method. The method is based on precise measurement of the 235U/238U ratio and 234U/235U ratio, which are used to calculate the 234U/238U ratio using the equation 234U/238U = 235U/238U x 234U/235U. The results show a significant improvement, i.e., more than 35 times better precision in measuring the (234)U/(238)U ratio with this method (sigma = 2.9 x 10(-8)) as compared to direct measurement of 234U/238U (sigma = 1.1 x 10(-6)). The method widens the applicability of the single collector system, and it will potentially be helpful to improve the precision in the case of the static multicollector system also.
ur Rehman
Ejaz
E
Applied Chemistry Laboratories, PINSTECH, P.O. Nilore, Islamabad, Pakistan. erehman@gmail.com
Naheed
Riffat
R
ur Rehman
Shakeel
S