P. 4212. The ratio of the components in a mixture, which consists of two elements, is to be determined. The atomic number of the elements are big, their atomic mass numbers are the same. and the amount of the sample is only 0.8 mg. We know that both elements decay when they are bombarded by neutrons. They behave similarly when absorbing neutrons. The half-life of element A is half an hour and the half-life of element B is an hour. Right after the neutron irradiation the emission is measured. At this time -- subtracting the background -- 400 particles are measured in 10 seconds, and after an hour only 145 particles are measured during 10 seconds.
Determine the mass of the element A and the mass of the element B in the sample.
Deadline expired on 11 January 2010.