Atomic & Molecular Physics-LS & JJ Couplings (CSIR Physical Sciences): Questions 1 - 4 of 4

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Question number: 1

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2012

MCQ▾

Question

The spin orbit interaction in an atom is given by H=aLS where L and S denote the orbital and spin angular momenta, respectively of the electron. The splitting between the levels 2P32 and 2P12 is – (June)

Choices

Choice (4) Response

a.

12a2

b.

52a2

c.

32a2

d.

3a2

Question number: 2

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2012

MCQ▾

Question

The spectral line corresponding to an atomic transition from J=1toJ=0 states splits in a magnetic field of 1 KG into three components separated by 1.6×103 . If the zero field spectral line corresponding to 1849 , what is the g – factor corresponding to the J=1 state? (You may use hcμ02×104cm ) (June)

Choices

Choice (4) Response

a.

32

b.

12

c.

2

d.

1

Question number: 3

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2011

MCQ▾

Question

If the hyperfine interaction in an atom is given by H=aSeSp , where Se and Sp denote the electron and proton spins, respectively, the splitting between the 3S1 and 1S0 state is – (December)

Choices

Choice (4) Response

a.

a2

b.

a22

c.

a22

d.

2a2

Question number: 4

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2012

MCQ▾

Question

The ground state of Pb nucleus has spin – parity jP=12 , while the first excited state has JP=52 . The electromagnetic radiations emitted when the nucleus makes a transition from the first excited state to the ground state are, (June)

Choices

Choice (4) Response

a.

E2andE3

b.

M2andM3

c.

E2andM3

d.

M2andE3

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