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IMPORTANT
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A fission reaction is given by U92236Xe54140+Sr3894+x+y, where x and y are two particles. Considering U92236 to be at rest, the kinetic energies of the products are denoted by KXeKSrKx 2 MeV and Ky 2 MeV, respectively. Let the binding energies per nucleon of U92236Xe54140 and Sr3894 be 7.5 MeV8.5 MeV and 8.5 MeV, respectively. Considering different conservation laws, the correct option(s) is (are)

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Important Questions on Nuclear Physics

MEDIUM
JEE Main/Advance
IMPORTANT
An accident in a nuclear laboratory resulted in the deposition of a certain amount of radioactive material of half-life 18 days inside the laboratory. Tests revealed that the radiation was 64 times more than the permissible level required for the safe operation of the laboratory. What is the minimum number of days after which the laboratory can be considered safe for use?
HARD
JEE Main/Advance
IMPORTANT

The electrostatic energy of Z protons uniformly distributed throughout a spherical nucleus of the radius R is given by E=35ZZ-1e24πε0R.

The measured masses of the neutron, H11, N715 and O815 are 1.008665 u, 1.007825 u15.000109 u and 15.003065 u, respectively. Given that the radii of both the N715 and O815 nuclei are the same, 1u=931.5 MeV c-2 (c is the speed of light) and e2/4πε0=1.44 MeV fm. Assuming that the difference between the binding energies of N715 and O815 is purely due to the electrostatic energy, the radius of either of the nuclei is 1 fm=1015 m

HARD
JEE Main/Advance
IMPORTANT
In a radioactive decay chain, Th90232 nucleus decays to Pb90212 nucleus. Let Nα and Nβ be the number of α and β- particles, respectively, emitted in this decay process. Which of the following statements is (are) true?
EASY
JEE Main/Advance
IMPORTANT
The energy spectrum of β-particles (number NE as a function of β-energy E) emitted from a radioactive source is:
EASY
JEE Main/Advance
IMPORTANT
When Li73 nuclei are bombarded by protons, and the resultant nuclei are Be84, the emitted particles will be
MEDIUM
JEE Main/Advance
IMPORTANT
If the binding energy per nucleon in Li37 and He24 nuclei are 5.60 MeV and 7.06 MeV, respectively, then in the reaction p+Li372He24 energy of proton must be:
MEDIUM
JEE Main/Advance
IMPORTANT
If Mo is the mass of an oxygen isotope O178Mp and MN are the masses of a proton and a neutron, respectively, the nuclear binding energy of the isotope is
EASY
JEE Main/Advance
IMPORTANT
In gamma-ray emission from a nucleus