Describe the method of performing Vicker’s hardness test with appropriate diagram.
See Answer →Explain the Austenite to Martensite diffusionless transformation with example.
See Answer → A thin target of
thickness is bombarded with a proton beam resulting in
. Calculate the reaction cross-section
for this nuclear reaction.
Given: Density of
Differentiate between Avrami and Johnson-Mehl models of phase transformations.
See Answer →Explain the phenomenon of nuclear fission. What is the importance of chain reactor in nuclear fission? Explain briefly the principle of operation of a nuclear reactor.
See Answer →A reactor operating at a power level of uses thermal neutrons producing fissions of
. If the thermal flux is
, calculate the mass of
present in the reactor? Assume
.
Explain Lever rule with appropriate diagram.
See Answer →The enthalpy of vacancy formation in nickel is , and its melting point is
. What is the equilibrium vacancy concentration in nickel at
?
What is reciprocity theorem of nuclear reactions? Obtain its mathematical expression. Rewrite the reciprocity theorem considering the spin of all the involved nuclei.
See Answer →Explain Fick’s diffusion laws.
See Answer →Calculate the energy produced (in Joules) by fission of of
.
Given: The energy released per fission of is
.
Obtain an expression of momentum distribution of -particles in the momentum range
to
, considering the Coulomb correction term. Also, derive the energy distribution function to get the shape of the
-decay spectrum.
What is F centre defect? Why is there a characteristic absorption energy associated with the F centre? If the F centre absorption energy for CsCl is 2.0 eV, what is its characteristic absorption wavelength?
See Answer →-decay process with one example
In the inclined crystal plane arrange the following sites in the order of increasing possibility of crystal growth site: terraces, kinks, ledges.
See Answer →- Nuclear isomerism
- Internal conversion,
Write the symmetries associated with the following 2-D defects:
i) Grain Boundary
ii) Twin Boundary
iii) Stacking Fault
See Answer → Determine the expected shell-model quadrupole moment of .
Write the semi-empirical mass formula. On the basis of semi-empirical mass formula, derive the condition of stability of a given nucleus.
See Answer →