Features
- Suitable for personal dosimetry in gamma and thermal neutron fields
- Ensures very good directional response
- Offers the advantages of RPL glass dosimetry
The Piesch dosemeter sphere1 is used for personal dosimetry in any environment, especially in isotope laboratories and in nuclear power plants. It can also be used as a reference dosemeter for dose comparisons and radiation beam calibrations, and it can be used as a dosemeter for measuring critical limits of nuclear material. The Piesch dosemeter sphere is a capsule accommodating an RPL phosphate glass dosemeter of only 8 mm x 8 mm x 4.7 mm size. The response is practically independent of the direction of incident radiation. After irradiation, the dosemeter reading is stimulated by UV light, emitting fluorescent light of high wavelengths. The intensity of the fluorescent light is dose proportional. An RPL reader is required to evaluate the RPL glass dosemeter. The dose information stored in the phosphate glass is not erased during the evaluation by UV light. This advantage makes the dosimeter suitable for long-term dosimetry. It can only be regenerated by heating it to 400 °C (750 °F). The fading of RPL glass is less than 10 % after 10 years. The measuring range is from 0.4 mSv to 30 Sv. The accuracy of routine measurements is better than ±15 %. The energy dependence is only ± 8 % in the range from 45 keV to 1.2 MeV. The Piesch sphere is made of synthetic material, embedded in a sphere of tin with convergent drillings. An admixture of boron makes it possible to measure thermal neutrons of nuclear reactions besides the measurement of gamma radiation.
Parts
L991015 Piesch dosemeter sphere
L999012 RPL glass dosemeter ASAHI FD-P8-1
RPL readers upon request
Image Gallery
Click on a thumbnail below to view full size.