Results
Experimental results of the movable underground detector are represented in the following table. Results contain the cosmic ray muon reduction factor compared to the muon counting rate on ground level.

Depth
(m) (m.w.e) 		Measurement time
(days) 		Amount of events Counting rate
(m-2 s-1) 		Reduction factor
0 0.5 7.64 x 106 120 -
400 (808) 8 13232 1.5 x 10-2 1.2 x 10-4
400 (766) 5.5 10510 1.5 x 10-2 1.3 x 10-4
660 (1901) 13.5 3850 2.2 x 10-3 1.9 x 10-5
990 (2813) 57 3282 4.4 x 10-4 3.8 x 10-6
1390 (3962) 114.5 1206 9.0 x 10-5 8.2 x 10-7


The measurements are in good agreement with results determined in other underground laboratories. Also the relation obtained for the underground muon flux as a function of depth is consistent with the previous investigations.


Last modified 1-June-2005 by Annika Mattila,