The half life of The time taken for the radioactivity of a sample of to dacay to 1/6 th of its initial value is:
Here, R = activity of radioactive
sulistance after n half–lives
From eq (i) , we get n = 4
Calculate the binding energy per nucleon of carbon nucleus. Given : mass of carbon atom = 12.00000 u, mass of proton = 1.00867 u, mass of electron = 1.00055 u. The energy equivalent of 1 u is 931.5 MeV.
Calculate the binding energy per nucleon of the nuclei of . Given :mass of hydrogen atom = 1.007825 u, mass of neutron = 1.008665 u, mass of atom = 55.934939 u, mass of atom = 208.980388u and . Which nucleus is more stable?
The binding energy energies of deuteron and -particle are 1.112 and 7.07 MeV/nucleon respectively. Find out in the process , state whether energy is supplied or liberated and how much?
A heavy nucleus X of mass number A = 240 and binding energy per nucleon = 7.6 MeV is split into two nearly equal fragments Y and Z of mass numbers A1 = 110 and A2 = 130. The binding energy of each one of these nuclei is 8.5 MeV per nucleon. Calculate the total binding energy of each of the nuclei X, Y and Z, and hence the energy Q released per fission in MeV.
The neutron separation energy is defined to be the energy required to remove a neutron from a nucleus. Obtain the neutron separation energy of the nucleus of . Given : mass of atom = 40.962278 u, mass of atom = 39.962591 u, mass of neutron = 1.008665 u and .
The nucleus decays by -emission. Write down the decay equation and determine the maximum kinetic energy of the emitted electron. The atomic masses of are 22.994466 u and 22.989770 u respectively.
When a deuteron of mass 2.0141 u and negligible kinetic energy is absorbed by a lithium nucleus of mass 6.0155 u, the compound nucleus disintegrates spontaneously into two alpha particles, each of mass 4.0026 u. Calculate the energy in joule carried by each alpha particle.
If the half lives of a radioactive element for α and β decay are 4 yrs and 12 yrs respectively, the ratio of their activities after six yrs will be
Half life of a radioactive sulistance A is 4 days. The probability that a nucleus will dacay in two half lives is
The half life of 131I is 8 days. Give a sample of 131I at time t = o, we can assert that