_ nondestructive read out
_ low influence of temperature, humidity, light
_ wide dose range (Gray .... 150 kGy)
_ stability of non irradiated and irradiated dosimeters
_ suitable as transfer, reference and routine dosimeter
_ suitable for different types of irradiation (g, e-, X-ray, n)
_ dose rate independent
Advantages of Alanine Dosimetry
Alanine dosimetry is an internationally accepted method for
dose measurements in different radiation fields. Alanine
dosimeters are often used as reference and transfer dosimeters.
In alanine, free radicals (unpaired electrons) are generated by
ionizing radiation (gamma radiation, electrons, neutrons,
charged particles). Because of the crystalline structure, the
recombination of the radicals is limited under normal
conditions. Recombinations of a few percents per year and
hyperfine interactions of the radicals occur at dose values
above 3 kGy. Electron spin resonance spectroscopy is used to
determine the radiation induced radicals in alanine. The
measurement signal is proportional to the dose and the
dosimeter mass. The dose calculation is done by using the
peak-to-peak value of the central line or area below the
measurement signal.
Principle
_ Transfer dosimetry
_ Dosimetry in blood irradiation facilities (dose distribution,
quality assurance)
_ Dosimetry in radiotherapy (afterloading)
_ Dosimetry in Universities und Institutes (test irradiations/
scientific test irradiations)
_ Industrial irradiation facilities (routine dosimetry system for
quality assurance).
Application Fields
Alanine
Dosimetry
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