Aleya Begum
(Department of Physics, BUET, 2003-03)
A study \\la, eontluctetl 10 delemlin~ Jctivity concentration of 'IlK, 20in,112pb, 114pb,
214H't~, ~iAe, 2J~Ra, 23-'Th, 1IOrb. "'r 0, noRa and 2JSU I' n JriOdotl cOlmnon y consume by
popuhltion of Bangl8desh, A total ...