Nuclear and Particle Physics MCQs Question and Answer in Engineering Physics

Which one of the following disintegration series of the heavy elements will give ²⁰⁹Bi as a stable nucleus?

The lifetime of an atomic state is 1ns. The natural line width of the spectral line in the emission spectrum of this state is of the order of

The quark content of $$\sum {^ + } ,\,{K^ - },\,{\pi ^ - }$$   and p is indicated: $$\left| {\sum {^ + } } \right\rangle = \left| {uus} \right\rangle ;\,\left| {{K^ + }} \right\rangle = \left| {s\overline u } \right\rangle ;\,\left| \pi \right\rangle = \left| d \right\rangle ;\,\left| p \right\rangle = \left| {uud} \right\rangle $$
In the process, $${\pi ^ - } + p \to {K^ - } + \sum {^ + } ,$$     considering strong interactions only, which of the following statements is true?

The four possible configurations of neutrons in the ground state of $${}_4^9Be$$  nucleus according to the shell model, and the associated nuclear spin are listed below. Choose the correct one

In the β-decay of neutron n → p + e^- + $$\overline V e$$ , the anti-neutrino $$\overline V e$$  escapes detection. Its existence is inferred from the measurement of

The strangeness quantum number is conserved in

The cross-sections of the reactions $$p + {\prod {} ^ - } \to {\sum {} ^ - } + {K^ + }$$     and $${p^ - } + {\prod {} ^ + } \to {\overline {\sum {} } ^ - } + {K^ - }$$     at a given energy are the same due to

A neutron scatters elastically from a heavy nucleus. The initial and final states of the neutron have the

The mass difference between the pair of mirror nuclei $${}_6^{11}C$$  and  $${}_5^{11}B$$ is given to be Δ MeV/c². According to the semi-empirical mass formula, the mass difference between the pair of mirror nuclei $${}_9^{17}F$$  and $${}_8^{17}O$$  will approximately be (rest mass of proton m_p = 938.27 MeV/c² and rest mass of neutron m_n = 939.57 MeV/c²)

Consider a nucleus with N neutrons and Z protons. If m_p, m_n and BE represents the mass of the proton, the mass of the neutron and the binding energy of the nucleus respectively and c is the velocity of light in free space, the mass of the nucleus is given by