It is desired to determine the concentration of arsenic in a lake sediment sample by means of neutron activation analysis.The nuclide captures a neutron to form ,which in turn undergoes $\beta$ decay.The daughter nuclide produces the characteristic $\gamma$ rays used for the analysis.What is the daughter nuclide?
A) Se
B) Ge
C) Ga
D) Se
E) Se

Question

It is desired to determine the concentration of arsenic in a lake sediment sample by means of neutron activation analysis.The nuclide  captures a neutron to form  ,which in turn undergoes $\beta$ decay.The daughter nuclide produces the characteristic $\gamma$ rays used for the analysis.What is the daughter nuclide?
A) Se 
B) Ge 
C) Ga 
D) Se 
E) Se

Quizplus · Accepted Answer

The nuclide that captures a neutron is not relevant to finding the daughter nuclide, but the information provided about the decay modes is important. The daughter nuclide undergoes β decay and produces characteristic γ rays, which indicates that it is a radioactive isotope that decays by β emission followed by γ emission. Of the options given, only Se (selenium) fits this description, as it has a β- decay followed by the emission of γ rays. Therefore, the correct choice is D, 11eaa8f0_66ca_df07_93a6_81e746a8484f_TB6423_11 Se.

It Is Desired to Determine the Concentration of Arsenic in a Lake