title: Determination of the half-life of I-125 encapsulated clinical seeds using a Si(Li) detector.
abstract: The half-life of two I-125 encapsulated clinical seeds was measured with a Si(Li) semiconductor detector. Two measurements of each seed yielded an average half-life of 59.56 +/- 0.17 days. The results are discussed in terms of the influence of possible I-126 contamination and leakage of I-125 activity through encapsulation. The present results are compared with a frequently cited value of 60.25 +/- 0.06 days. The difference between the two values was found to be statistically significant at a 95% confidence level.
mesh_terms: D001918:Brachytherapy / Q000592:standards*; D006207:Half-Life; D006801:Humans; D007457:Iodine Radioisotopes / Q000627:therapeutic use*; D008094:Lithium; D011874:Radiometry / Q000295:instrumentation; D012666:Semiconductors; D012825:Silicon
chemical_list: D007457:Iodine Radioisotopes; D008094:Lithium; D012825:Silicon