A dose calibrator accuracy test may be performed with which of the following radioactive sources?

The accuracy test of a dose calibrator requires the use of a radioactive source that has specific calibration standards and characteristics to ensure reliable measurements across a range of activities. In this context, using 75 uCi of 137Cs is suitable for testing the accuracy of the dose calibrator because it is a well-established gamma-emitting source with known calibration factors and decay characteristics.

137Cs emits gamma radiation at energy levels that are well within the calibration range of most dose calibrators, making it an ideal choice for verifying the calibration of the measuring device. Its half-life of approximately 30 years means that it remains a stable and consistent source over time, which is crucial for accuracy testing.

The activity of 75 uCi is a reasonable level for performance testing, ensuring that the dose calibrator can accurately measure the radiation emitted without being impacted by excessive counts or saturation effects. This makes it practical for calibration checks in a clinical setting.

In contrast, while the other options may also represent radioactive sources, they either provide activities that are too high or too low, or they involve isotopes with different energy emissions that are less suited for accuracy testing in a dose calibrator. Using isotopes without the appropriate energy or calibration standards could lead to inaccurate readings, which