ESTIMATING STRENGTHS OF INDIVIDUAL RADIOISOTOPES IN A MULTIPLE-ISOTOPE SOURCE
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
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In work related to radiation shielding, the use of radioisotope techniques, and activation analysis, an experimenter must often analyze counting data where counts are caused by the natural background and by the decay of more than one radioisotope. In the report a procedure is developed for estimating the strength of each isotope at different times from several decaying radioactive samples of a single multiple-isotope source. In addition, the procedure provides a method for placing confidence limits on the strengths and a method for partitioning the imprecision of estimating the strengths into three principal causes Poisson variation, sampling error, and residual error called mechanical error. An operational FORTRAN II-D computer program, SAND, implements the procedure. The procedure and program were tested by using fictitious data with known properties as inputs. The results of the simulation were in reasonable agreement with the theoretical values.
- Radioactivity, Radioactive Wastes and Fission Products