Cell: Structure and Functions
The element curium 96Cm248 has a mean life of 1013s.. Its primary decay modes are spontaneous fission and α-decay, the former with a probability of 8 and the later with a probability of 92. Each fission releases 200 MeV of energy. The masses involved in a decay are as follows: 96Cm248=248.072220u,94Pu244=244.064100u and 2He4=4.002603u Calculate the power output from a sample of 1020Cm atoms. (1u=931MeV/c2).
In a certain hypothetical radioactive decay process, species A decays into species B and species B decays into species C according to the reactions: A→2B+particles+energy B→3C+particles+energy The decay constant for species is λ1=1sec−1 and that for the species B is λ2=100sec−1. Initially 104moles of species of A were present while there was none of B and C. It was found that species B reaches its maximum number of moles of B.
A radioactive sample contains 10 3 kg each of two nuclear species A and B with half-life 4 days and 8 days respectively The ratio of the amounts of A and B after a period of 16 days is
Assume that a neutron breaks into a proton and an electron. The energy released during this process is: (mass of neutron =1.6725×10−27kg, mass of proton =1.6725×10−27kg, mass of electron =9×10−31kg).