An experimental calibration of indoor room and outdoor soil detector device
s which are based on LR 115 as sensitive element has taken place at the Swe
dish Radiation Protection Institute in Stockholm(Sweden) in 1994 and 1996,
at the Physikalisch-Technischen Bundesanstalt in Braunschweig (Germany) in
1997 and at the Umweltforschungszentrum Leipzig-Halle (Germany) in 1997. Sp
ecial properties of the used solid state nuclear track detector (SSNTD) mat
erial LR 115* have been measured to define the application of the experimen
tal calibration.