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This paper describes the determination of the relative masses or relative areal densities of two new sets of reference deposits, prior to destructive analysis of subsets of these deposits by isotope dilution mass spectrometry and nondestructive analyses by other means. The goal of the present work is to improve the accuracy of the results to the level of one part per thousand. Improvements were attempted in several aspects of the measurements. The most significant improvement was realised by the increase in the number of repetitions of each measurement. In addition, a more extensive and elaborate data acquisition system was used, and an run-to-run monitor was employed to avoid possible problems related to the dependence of the 235U monitor on neutron temperature variations.

Additional information

Authors: SCOTT R D ET AL., JRC Geel (BE);GILLIAM D M, National Institute of Standards and Technology, Gaithersburg (US)
Bibliographic Reference: Paper presented: 17th World Conference of the INTDS, Bloomington (US), October 17-21, 1994
Availability: Available from (1) as Paper EN 38729 ORA
Record Number: 199411600 / Last updated on: 1995-01-10
Original language: en
Available languages: en