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7 Nuclear Physics – I
Nuclear resonance fluorescence
If E 0 is the transition energy in an atom of mass M, the resonance energy E γ = hν
is given by
E γ = E 0 − E
2 γ /2Mc
2
(7.52)
The recoil energy
E R = E
2 γ /2Mc
2
(7.53)
The width of the energy level Γ is the full width at half maximum, Fig. 7.10. Γ is
calculated from the mean life time by the uncertainty principle
Γ.τ =
(7.54)
Fig. 7.10 Nuclear resonance
fluorescence
Compensation for the recoil energy loss
Source velocity v = E 0 /Mc
(7.55)
Mosbauer Effect is the recoilless emission and absorption of nuclear radiation
Δ E r /E r = v/c.
(7.56)
Radioactivity
Radioactivity is the spontaneous disintegration of an atomic nucleus. In natural
radioactivity, the decay may occur via alpha, beta or gamma emission. In artificial
radioactivity, neutron or proton may also be emitted.
7 Nuclear Physics – I
Nuclear resonance fluorescence
If E 0 is the transition energy in an atom of mass M, the resonance energy E γ = hν
is given by
E γ = E 0 − E
2 γ /2Mc
2
(7.52)
The recoil energy
E R = E
2 γ /2Mc
2
(7.53)
The width of the energy level Γ is the full width at half maximum, Fig. 7.10. Γ is
calculated from the mean life time by the uncertainty principle
Γ.τ =
(7.54)
Fig. 7.10 Nuclear resonance
fluorescence
Compensation for the recoil energy loss
Source velocity v = E 0 /Mc
(7.55)
Mosbauer Effect is the recoilless emission and absorption of nuclear radiation
Δ E r /E r = v/c.
(7.56)
Radioactivity
Radioactivity is the spontaneous disintegration of an atomic nucleus. In natural
radioactivity, the decay may occur via alpha, beta or gamma emission. In artificial
radioactivity, neutron or proton may also be emitted.