Measurement of the depth distribution of average LET and absorbed dose inside a water-filled phantom on board space station MIR.

Abstract

The Atominstitute of the Austrian Universities developed the HTR-method for determination of absorbed dose and "averaged" linear energy transfer (LET) in mixed radiation fields. The method was applied with great success during several space missions (e.g. STS-60, STS-63, BION-10 and BION-11) and on space station MIR in the past 10 years. It utilises the changes of peak height ratios in LiF thermoluminescent glowcurves in dependence on the LET. Due to the small size of these dosemeters the HTR-method can be used also for measurements inside tissue equivalent phantoms. A water filled phantom with a diameter of 35 cm containing four channels where dosemeters can be exposed in different depths was developed by the Institute for Biomedical Problems. This opens the possibility to measure the depth distribution of the average LET and the dose equivalent simultaneously. During phase 1 dosemeters were exposed for 271 days (05.1997-02.1998) in 6 different depths inside the phantom, which was positioned in the commander cabin. In phase 2 dosemeters were exposed in 2 channels in 6 different depths for 102 days (05.1998-08.1998) in the board engineer cabin, following an exposure in different channels in 3 different depths for 199 days (08.1998- 02.1999) in the Modul KWANT 2.

Cite this paper

@article{Berger2001MeasurementOT, title={Measurement of the depth distribution of average LET and absorbed dose inside a water-filled phantom on board space station MIR.}, author={Thomas Berger and Michael Hajek and W. Schoner and Mamfred Fugger and Norbert Vana and Michelle Noll and Rebecca Ebner and Y A Akatov and Vyacheslav A. Shurshakov and V A Arkhangelsky}, journal={Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics}, year={2001}, volume={17 Suppl 1}, pages={128-30} }