[Energy and angular sensitivity of the S2010 dosimeter]

Area of Science:

• Medical Physics
• Radiation Dosimetry

Background:

• X-ray equipment requires precise radiation monitoring for safety.
• Modern characteristics necessitate validation of dosimetry equipment within specific energy ranges.

Purpose of the Study:

• To validate the 5-130 keV energy range for radiation control in X-ray examination rooms.
• To assess the sensitivity and accuracy of the S2010 dosimeter within this validated range.

Main Methods:

• Experimental determination of the S2010 dosimeter's sensitivity across the 5-130 keV spectrum.
• Measurement of angular anisotropy using 109Cd radiation source.
• Evaluation of dosimeter background noise in different energy intervals.

Main Results:

• The S2010 dosimeter exhibits measurement errors exceeding 25% for radiation below 26 keV.
• Angular anisotropy was observed, with a relative sensitivity of 0.8 at a corporal angle of 0.04 pi sr.
• Dosimeter background levels were recorded as 0.05 mR/h (4-14 keV) and 0.01 mR/h (14-140 keV).

Conclusions:

• The 5-130 keV range is validated for X-ray room radiation control.
• The S2010 dosimeter's accuracy is limited below 26 keV, necessitating careful orientation due to its narrow aperture and angular sensitivity.
• Background radiation levels are quantified for accurate measurement interpretation.