Which dosimeter is NOT typically used for measuring electron beam distributions?

Thermal stimulators are not typically used for measuring electron beam distributions because they primarily serve a different purpose in the field of dosimetry. They are more commonly employed in the context of measuring cumulative dose from radiation rather than specific beam characteristics. Their design and energy response mechanisms make them less suitable for accurately capturing the nuanced dose distributions produced by electron beams, which require real-time measurements of dose across various depths to evaluate their effectiveness.

In contrast, irradiated film, ionization chambers, and semiconductor diodes are well-suited for this task. Irradiated film is sensitive to the dose delivered and can provide detailed spatial information relevant to electron beams. Ionization chambers are capable of measuring the dose directly and are often used for calibration purposes in radiation therapy, providing reliable readings that align well with electron beam characteristics. Semiconductor diodes, on the other hand, are advantageous in measuring dose distributions due to their small size and nearly immediate response to radiation exposure, allowing for precise assessments in varied beam conditions.