Nuclear Reactions

Thermal neutrons at the room temperature have an energy of $0.025 \mathrm{eV}.$ Half-life of neutrons is $10$ minutes. If a source gives out a beam of neutrons, at what distance from the source, half the neutrons would have decayed?

The average translational kinetic energy depends only on _____ temperature.

Does average kinetic energy depend only on temperature?
 

How do you find the kinetic energy of a thermal neutron?
 

What is the average kinetic energy of a molecule in terms of temperature?
 

In the following nuclear reaction ${}_{6}C^{11}\to {}_{5}B^{11}-{\beta }^{-}-x, x$ stands for  

When ${}_3{}^7\mathrm{Li}$ nuclei are bombarded by protons, the resultant nuclei is ${}_4{}^8\mathrm{Be}$. The emitted particles will be

Explain electron capture.

What is the nuclear equation for the electron capture decay of $\mathrm{Argon}-37$? Calculate the energy released.

The complete reaction equation for electron capture by ${}^{15}\mathrm{O}$ is ${}_8^{15}{\mathrm{O}}_7+e^{-}{\to }_7^{15}{\mathrm{N}}_8+{\nu }_e$. Calculate the energy released in $\mathrm{MeV}$.

Write the complete reaction equation for electron capture by ${}^{15}\mathrm{O}$. Calculate the energy released.

In beta decay, the typical Q value is approximately:

The nucleus of element $X\left(A=220\right)$ undergoes $\alpha$−decay. If $Q$-value of the reaction is $5.5\mathrm{MeV}$, then the kinetic energy of $\alpha$−particle is:

Consider the following nuclear reactions:

I. ${}_7{}^{14} \mathrm{N}+{}_2{}^4\mathrm{He}⟶{}_8{}^{17}\mathrm{O}+X$

II. ${}_4{}^9\mathrm{Be}+{}_2{}^4\mathrm{H}⟶{}_6{}^{12}\mathrm{He}+Y$

Then,

In the reaction ${}_1{}^2\mathrm{H}+{}_2{}^3\mathrm{H}\to {}_2{}^4\mathrm{He}+{}_0{}^{1}n$, if the binding energies per nucleon of ${}_1{}^2\mathrm{H}$, ${}_1{}^3\mathrm{H}$ and ${}_2{}^4\mathrm{He}$ are $x$, $y$ and $z$, respectively. Then, the energy released in the process is

Which of the following elements is most widely used for nuclear fission?

Assume that an electron and a positron pair is formed from a gamma ray photon having energy $3.0 \mathrm{MeV}.$ If the total kinetic energy of the positron and the electron that is formed is $n\times {10}^{-2} \mathrm{MeV}$. Find the value of $n$.

$\left({\mathrm{m}}_{\mathrm{e}}=9.1\times {10}^{-31} \mathrm{kg}, \mathrm{c}=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}, \mathrm{e}=1.6\times {10}^{-19} \mathrm{C}\right)$

A nucleus with mass number $224$ initially at rest emits an $\alpha$ particle. If the $Q$ value of the reaction is $8MeV$ and only one photon of energy $2.00MeV$ is subsequently emitted after the emission of the $\alpha$ particle, the kinetic energy (in $MeV$ ) of the $\alpha$ particle is : (Approximate the answer to the nearest integer.)

A nucleus of mass number $232$ and atomic number $90$, after many disintegrations of $\alpha$ and $\beta$ radiation, decays into other nuclei whose mass number is $220$ and atomic number is $86.$ The numbers of $\alpha$ and $\beta$ radiations will be:

Identify the missing product in the given nuclear reaction ${}_{92}{}^{235}\mathrm{U}+{}_0{}^1\mathrm{n}\to ?+{}_{36}{}^{92}\mathrm{Kr}+3_0^1\mathrm{n}$