Nuclear Physics

Consider the following nuclear fission reaction ${}_0^1 n + {}_{92}^{235}U \rightarrow {}_Z^A Y + {}_{41}^{99}Nb + neutrons$. If $4$ neutrons are released during the fission process, then $A$ and $Z$ are

At time $t = 0$, the activity of a radioactive substance is $1600$ Bq. At $t= 8$ s, the activity remains $100$ Bq. The activity at $t = 2$ s, the is

For a radioactive nucleus that undergoes $\beta^+$ decay, which of the following CANNOT occur?

The activity of a freshly prepared radioactive sample of a radioisotope is $10^{10}$ disintegrations per second. The average life ($\tau$) of this isotope is $10^9\ \text{s}$, and the mass of a single atom of this…

A radioactive nucleus ${}_{92}X^{235}$ decays to ${}_{91}Y^{231}$. Which of the following particles are emitted?

When a nucleus in an atom undergoes a radioactive decay, the atomic number and/or mass number of the atom

The equation ; $4\ {}^{1}_{1}\text{H} \rightarrow {}^{4}_{2}\text{He}^{2+} + 2\ e^- + 26\ \text{MeV}$ represents

Two spherical nuclei have mass numbers 216 and 64 with their radii $R_1$ and $R_2$ respectively. The ratio $\dfrac{R_1}{R_2}$ is

A radio isotope X with a half life $1.4 \times 10^8$ year, decays to Y, which is stable. A sample of rock from a cave was found to contain X and Y in the ratio $1 : 7$. The age of rock (in year) is

A common example of $\beta^-$ decay is ${}_{15}\text{P}^{32} \longrightarrow {}_{16}\text{S}^{32} + x + y$ Then x and y , respectively, stand for

A nucleus of mass number $189$ splits into two nuclei having mass number $125$ and $64$. The ratio of radius of two daughter nuclei respectively is:

The rate of disintegration of a radioactive sample is $R$ and the number of atoms present at any time $t$ is $N$. When $\frac{R}{N}$ is taken along $Y$-axis and $t$ is taken along $X$-axis, the correct graphs is