Measurements with shielded gamma counters

We started taking counts on each floor of NSC building with 3 side shielded gamma couters(SPA-3 and LEG-1). Khristian Pettigrew who is really interested on cosmic radition, joint with our group to carry on this project.




Khristian is wrapping up the lead bricks with paper sheets











Some views of 3 side shielded gamma counter. Lead bricks used to shield the 3 sides and the bottom of the counters. Hence, the detector only responses to gamma rays which are comming from up





























Khristian is preparing the setup to get measurements on 2 floor of NSC building.