nuclear physics

. When a nucleus absorbs the neutron a compound nucleus is formed and some excitation energy is imparted to the nucleus. While the surface tension of the nucleus tries to keep the nucleus in spherical shape, the excitation energy tries to deform the nucleus and hence strong oscillations are set up ..

A model nuclear reactor is shown in Fig. 10.6. A nuclear reactor mainly consists of (i) Fuel (ii) Moderator (iii) Control rods (iv) Radiation shielding (v) Coolant. 1 . Fuel : The fissionable material used in the reactor is called the fuel. The commonly used fuels a..

According to Bohr and Wheeler the nucleus behaves like a liquid drop. It has spherical shape due to surface tension, which is attributed to the short range nuclear forces of attraction among nucleons. But the electrostatic force of repulsion tries to distort this shape. When the nuc..

(V) -0.87 -1.66 -0.56 -0.34 +1.26 In Ga, In and 77 the d electrons (d 10 ) in the penultimate shell do not shield the valence electrons from nuclear attraction effectively (since shielding by various electrons is in the order s >p >d >/) and hence the outer electrons are held mor..

We come across number of physical quantities which vary in magnitude over a wide range. For example the size of atom to size of universe, the half life of an element from small fraction of a second to millions of years, weak glavitational force to strong nuclear force etc. T..

"> which is extensively used in atomic and nuclear physics is an electron volt. An electron carries a charge -e whereas a positron or a proton carries a charge +e. In general, a charge of magnitude e is called the natural unit or quantum of charge. Now when a charge moves withou..

Atomic mass unit is the unit of mass, used in nuclear physics as adopted by the International Union of Pure and Applied Physics (IUPAP). One amu is equal to {l/12)th of the mass of one 6 C 12 atom. The number of carbon atoms contained in 12 x 10" 3 k..

. Here the mass of water is 100 grams and the specific heat of .water is 4.186 J/g C. Hence heat absorbed by water Q = mx s x t Thus by burning 1 g of wax candle the heat generated will be Q/W, which is calorific value of wax. Units of mass and energy : Units of mass : In Solid State Physics..

1.^Why do we replace a theory by another ? 2. Every great physical theory starts as a heresy and ends as a dogma ? Give examples for the validity of this remark. 3. y/the most incomprehensible thing about the world is that it is comprehensible". Who said / this ? What does this me..

[correctly it was proportional to cos 4 (0/2)] (iii) the reciprocal of the fourth power of velocity of the incident a-particles and (iv) the square of the nuclear charge of the scattering material. The conclusions drawn from the a-particles scattering experiment are : (i) the positive cha..