Home
Class 12
PHYSICS
A polonium nucleus transforms into one o...

A polonium nucleus transforms into one of lead. Find the kinetic energy of the alpha-particle and of the recoil nucleus.

Text Solution

Verified by Experts

The correct Answer is:
`K_(alpha)=4.45MeV;K_(Pb)=1.05MeV`.
The transition energy is equal to the difference between the energy of the original nucleus and the rest energy of the reaction products:
`epsi=[209.93297-(4.00260+205.97446)]xx931.5=5.5MeV`
This energy is equal to the sum of kinetic energies of the alpha-particle and the recoil nucleus : `epsi=K_(alpha)+K_(Ph)andK_(alpha)//K_(Ph)=M_(Ph)//M_(alpha)`.
Promotional Banner

Similar Questions

Explore conceptually related problems

Free ^238 U nuclei kept in a train emit alpha particles. When the train is stationary and a uranium nucleus decays, a passenger measues that the separation betwee the alpha particle and the recoiling nucleus becomes x in time t after the decay. If a decay takes place when the train is moving at a uniform speed v , the distance between the alpha particle and the recoiling nucleus at a time t after the decay, as measured by the passenger will be

A stationary radioactive nucleus of mass 210 units disintegrates into an alpha particle of mass 4 units and residual nucleus of mass 206 units. If the kinetic energy of the alpha particle is E, then the kinetic energy of the residual nucleus is

An alpha -particle after passing through a potential difference of 2 xx 10^(6) V falls on a silver foil. The atomic number of silver is 47. Calculaye (i) the kinetic energy of the alpha -particle at the time of falling on the foil (ii) the kinetic energy of the alpha -particle at a distance of 5 xx 10^(-14) m from the nucleus and (iii) the shortest distance from the nucleus of silver to which the alpha -particle reaches.

A free ^238U nucleus kept in a train emits an alpha particle. When the train is stationary, a nucleus decays and a passenger measures that the separation between the alpha particle and the recoiling nucleus becomes x at time t after the decay. If the decay takes place while the train is moving at a uniform velocity v, the distance betwen the alpha particle and the recoiling nucleus at a time t after the decay as measured by the passenger is

In Rutherford experiment alpha – particles are scattered by nucleus having change 100 e^(-) Initial kinetic energy of alpha - particles is 6 MeV . The size of the nucleus is

A nucleus of mass 220 amu in the free state decays to emit an alpha -particle . Kinetic energy of the alpha -particle emitted is 5.4 MeV. The recoil energy of the daughter nucleus is