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 → Calculate the third component of isospin T3 for and
.
List any three major differences between low energy scattering and
scattering.
Explain and justify the observed deviations in magnetic dipole moment and quadrupole moment of deuteron.
See Answer → For the nuclear charge density , compute the charge form factor and the mean square charge radius
.
The mass defects for and
are
, and
respectively. Calculate the corresponding atomic mass.
Describe the various methods of creating point defects. Discuss the constructive (positive) effect of dislocations in materials.
See Answer →How do the interactions between the substrate and adsorbate atoms determine the growth mode of thin films? Describe the various modes of thin film growth.
See Answer →What is green compaction in powder processing? How is the porosity of compacted piece reduced?
See Answer →Given that the density of molten Ge is 5.60 g cm⁻³ calculate the amount of boron required to obtain 10 kg p-type Ge with dopant concentration of 10¹⁷ cm⁻³. Take density of boron = 2.34 g cm⁻³, atomic weight of boron = 10.811 and k₀ = 0.8.
See Answer →Explain the difference between chemical vapour deposition and physical vapour deposition. What are the requirements of a material to be used as a holder for the charge in a thermal evaporation system? Mention any three materials used for the purpose.
See Answer →With the help of appropriate diagrams describe the possible ways of accommodating the added alloying elements into a pure metal lattice for the following cases:
i) Limited solubility
ii) Good solubility.
See Answer →
Show that the root mean square crow-flight distance for neutrons from an infinite plane source in an infinite medium is .
Derive two-group diffusion equations for a critical homogeneous reactor in steady state.
See Answer →