Nuclear Physics

A radioactive sample of half life $23.1\mathrm{days}$is disintegrating continuously. The percentage decay ofthe samplebetween the$15^{\mathrm{th}}$and$16^{\mathrm{th}}$ daywill be [Take, $e^{0.03}=1.03$]

Cobalt (60) isotope is used in the treatment of :

The atomic mass of ${ }_6 \mathrm{C}^{12}$ is 12.000000 u and that of ${ }_6 \mathrm{C}^{13}$ is 13.003354 u . The required energy to remove a neutron from ${ }_6 \mathrm{C}^{13}$, if mass of neutron is 1.008665 u ,…

The nucleus having highest binding energy per nucleon is

Two radioactive elements $A$ and $B$ initially have same number of atoms. The half life of $A$ is same as the average life of $B$. If $\lambda_A$ and $\lambda_B$ are decay constants of $A$ and $B$ respectively, then…

A radio-active material is reduced to $1 / 8$ of its original amount in 3 days. If $8 \times 10^{-3} \mathrm{~kg}$ of the material is left after 5 days. The initial amount of the material is

In a radioactive material the activity at time $t_1$, is $A_1$ and at a later time $t_2$, it is $A_2$. If the decay constant of the material is $\lambda$, then

Three specimens A, B, C of same radioactive element has activities 1 microcurie, 1 rutherford and 1 becquerel respectively. Which specimen has maximum mass?

A radioactive sample of half life $23\cdot 1 \text{days}$ is disintegrating continuously. The percentage decay of the sample between the ${15}^{\text{th} }$ and ${16}^{\text{th} }$ day will be [Take, ${e}^{0\cdot…

Some amount of a radioactive substance (half-life $=10$ days) is spread inside a room and consequently, the level of radiation becomes $50$ times the permissible level for normal occupancy of the room. After how many…

The activity of a radioactive sample is measured as ${N}_{0}$ counts per minute at $t=0$ and $\frac{{N}_{0}}{e}$ counts per minute at $t=5 \text{min}$. The time (in minutes) at which the activity reduces to half its…

The mass of $_{7} \mathrm{~N}^{15}$ is $15.00011 \mathrm{amu}$, mass of $_{8} \mathrm{O}^{16}$ is 15.99492 amu and $m_{p}=1.00783$ amu. Determine binding energy of last proton of ${ }_{8} \mathrm{O}^{16}$?