Write the Bethe-Weiszacker mass formula. Explain the various terms involved in it. Draw curves, between binding energy per nucleon versus mass number, which represents contribution of various terms in the semi-empirical mass formula of binding energy per nucleon.
c) (i) The experimentally observed magnetic dipole moment of deuteron is
On the basis of observed dipole moment, what are the possible
spin configurations in which neutron and proton can exist in deuteron
(ii) Justify the possible reasons for the deviation in the observed and expected
value of magnetic dipole moment of deuteron.
Given:
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The mass defects forCalculate
the corresponding atomic mass.
Explain tensor potential which justifies the non – zero quadrupole moment of deuteron.
Tritium emits electrons and magnesium emits positrons. Represent the
two decay processes by equations and calculate in each case the end-point energy of the particles emitted.
Given:
What is charge conjugation? Derive the eigenvalues of the charge conjugation operator
List the quantum numbers associated with leptons. State whether they are conserved in strong, weak and electromagnetic interactions. Hence explain whether the following reactions are allowed
:
b) Show thats a weak interaction decay whereas
electromagnetic decay.
On the basis of semi-empirical mass formula, explain as why there are two mass parabola for even-A nuclei and only one for A-odd nuclei.
What are the four fundamental forces in nature? List the field particles that mediate these interactions and their properties. Which of the fundamental forces (interactions) are responsible for the neutrino flux from the sun and the neutrinos produced in the reactors?