Home
Class 12
PHYSICS
In an alpha -decay, the kinetic energy o...

In an `alpha` -decay, the kinetic energy of `alpha`-particles is `48 MeV` and `Q` value of the reaction is `50 MeV`. The mass number of the mother nucleus is (assume that daughter nucleus is in ground state)

A

`96`

B

`100`

C

`104`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
We have `K_(alpha)=(m_(y))/(m_(y)+m_(alpha)).Q " "rArr K_(alpha)=(A-4)/(A).Q" "rArr48=(A-4)/(A).50 " "rArrA=100`
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Exercise-2 Part -2 Single and double value interger type|15 Videos

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Exercise-2 Part-3 One more than one options correct type|7 Videos

  • NUCLEAR PHYSICS

    RESONANCE|Exercise Exercise-1 Part-2 Only one option correct type|27 Videos

  • GRAVITATION

    RESONANCE|Exercise HIGH LEVEL PROBLEMS|16 Videos

  • REVISION DPP

    RESONANCE|Exercise All Questions|444 Videos

Similar Questions

Explore conceptually related problems

In an alpha -decay, the kinetic energy of alpha particle is 48 (MeV) and Q value of the reaction is 50MeV . The mass number of the mother nucleus is (Assume that daughter nucleus is in ground state).

The alpha -decay of nucleus X^(230) is accompanied by emission of two groups of alpha- particles-one group having alpha- particles of kinetic energy 6.7MeV and other having alpha -particles of kinetic energy 5.2 MeV. Following the emission of these particles the daugheter muclei are found in ground and exiceted states. find the energy of gamma photon. that is subsequenctly emitted by de-exictation of the excited daughter nuclei. Assume that nuclei of X^(230) are at rest.

The nucleus with atomic number 184 initially at rest an alpha-particle, if Q value of reaction is 5.5 MeV. Calculate KE of alpha-particle

In the alpha -decay process occuring in different types of nuclei at rest (i) the K.E. of the daughter nucleus is always greater than the K.E. of the alpha -particle (ii) the K.E. of the daughter nucleus is always less than the K.E. of the alpha -particle (iii) the magnitudes of the linear momenta of the alpha -particle and the daughter nucleus are always equal (iv) the daughter nucleus is always in a stable state

A nucleus ""^(220)X at rest decays emitting an alpha -particle . If energy of daughter nucleus is 0.2 MeV , Q value of the reaction is

RESONANCE-NUCLEAR PHYSICS-Exercise 2 Part-1 Only one option correct type
  1. Choose the wrong statement.

    Text Solution

    |

  2. Binding energy per nucleon of fixed nucleus X^(A) is 6 MeV. It absorbs...

    Text Solution

    |

  3. The half - life of ^(215) At is 100 mu , s.The time taken for the radi...

    Text Solution

    |

  4. A free neutron decays to a proton but a free proton does not decay to ...

    Text Solution

    |

  5. Proton and singly ionized of U^(235) & U^(238) are passed in turn (whi...

    Text Solution

    |

  6. When a beta^(-) particle is emitted from a nucleus, the neutrons-proto...

    Text Solution

    |

  7. Consider a sample of a pure beta-active material

    Text Solution

    |

  8. Masses of two isobars .(29)Cu^(64) and .(30)Zn^(64) are 63.9298 u and ...

    Text Solution

    |

  9. In an alpha -decay, the kinetic energy of alpha-particles is 48 MeV a...

    Text Solution

    |

  10. Free ^238 U nuclei kept in a train emit alpha particles. When the trai...

    Text Solution

    |

  11. A nucleus with mass number 220 initially at rest emits an alpha-partic...

    Text Solution

    |

  12. A charged capacitor of capacitance C is discharged through a resistanc...

    Text Solution

    |

  13. At time t=0, some radioactive gas is injected into a sealed vessel. At...

    Text Solution

    |

  14. A sample of radioactive meterial has mass m, decay constant lambda, an...

    Text Solution

    |

  15. Two radioactive substances X and Y initially contain an equal number o...

    Text Solution

    |

  16. Two identical samples (same material and same amout) P and Q of a radi...

    Text Solution

    |

  17. N atoms of a radioactive element emit n alpha particles per second. Th...

    Text Solution

    |

  18. The radioactivity of a given sample of whisky due to tritium (half lif...

    Text Solution

    |

  19. A overset(lambda(1)) rarr B overset (lambda(2))rarr C t=0 N(0) 0 ...

    Text Solution

    |

  20. 90% of a radioactive sample is left undecayed after time t has elapese...

    Text Solution

    |