M.Sc.(Semester III) (CBCS) Examination Oct/Nov-2017
Physics (Materials Science)
ATOMIC, MOLECULAR NUCLEAR PHYSICS
Day Date: Saturday, 18-11-2017 Max. Marks: 70
Time: 02:30 PM to 05.00 PM
Instructions: Q. No. and Q. No are compulsory.
Attempt any three from Q. No. to Q. No.
Use of Non programmable calculator is allowed.
All questions carry equal marks.
Q.1 Choose correct alternative: 06
If the principal quantum number is the azimuthal quantum number
can have values


2 For the Lande' factor is given by

∗2+
∗2−
∗2
∗2
∗2+
∗2−
∗2
∗2

LS-coupling
3 of molecules have all moment of inertia
Linear molecules Symmetric tops
Spherical top Asymmetric tops
4 According to the single particle nuclear shell model, the spin parity of
the ground state of
17 is
a)1−2
b)3−2


5 The symmetry term in semi empirical mass formula is due to
Non equality of proton number Z and neutron number N
Non spherical shape of nuclei
Charge independence of nuclear force
Non zero value of quadrupole moment of nuclei
6 Semi-empirical mass formula for the binding energy of nucleus
contains a surface correction term, This term depends on the mass
number A of the nucleus.


Page 2 of 2
SLR-MO-532
Fill in the blanks: 04
Pure rotational spectra arise from transition between ___energy states.
The binding energy of deuteron is
If value of nuclear reaction is negative the reaction is
Hund's Rule applies to
State true or false: 14
Hyperfine structure is observed due to the different isotopes of the
same chemical element.
Deuteron has odd parity.
±1, ±1
Transition rule for the vibrational-rotational spectra are
The electric quadrupole moment is positive; shape of the nuclei is
oblate.
Q.2 Answer in brief. (Any three)
What are limitations of shell theory? 04
Discuss the hyperfine structure of spectral lines. 04
Discuss the nuclear reaction kinematics. 05
What is rigid rotator? Give the classification of rigid rotator molecules with
examples.
05
Q.3 Discuss the effective range theory of low energy in np scattering. 10
Explain the Lande interval rule. 04
Q.4 Discuss normal and anomalous Zeeman effects in case of atomic
spectra? Show Zeeman spectra for 3
3D level.
08
Write short note on value of nuclear reactions. 06
Q.5 Describe liquid drop model of nucleus. Point out its usefulness and
limitations in understanding the nuclear phenomena.
10
Discuss the spectrum given by linear polyatomic molecule. 04
Q.6 What are the experimental characteristics of direct nuclear reactions? 10
Write properties of deuteron. 04
Q.7 Obtain an expression for the rotational energy of a diatomic molecule
considering rigid rotator model.
10
Drive the expression of semi-empirical mass formula. 04