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Recoil Energy Loss in Free Atoms and Thermal Broadening of Transition Lines

3 Recoil Energy Loss in Free Atoms and Thermal Broadening of Transition Lines [Pg.10]

In the description of nuclear y-resonance, we assume that the photon emitted by a nucleus of mean energy Eq = E —Eg carries the entire energy, Ey = Eq. This is not true for nuclei located in free atoms or molecules, because the photon has [Pg.10]

Suppose the nucleus was at rest before the decay, it takes up the recoil energy [Pg.11]

Because of the large mass of the nucleus and the low recoil velocity involved, we may use the nonrelativistic approximation [Pg.11]

Since r is very small compared to Eq, it is reasonable to assume that Ey Eq, so that we may use the following elementary formula for the recoil energy of a nucleus in an isolated atom or molecule  [Pg.11]




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Atom line

Atom loss

Atomic lines

Atomic transitions

Atomization thermal

Energies of transitions

Energy of atom

Energy thermal

Energy, transition energies

Free atoms

Free energy loss

Free energy of transition

Free thermal

In line

Line broadening

Loss-free

Recoil

Recoil atomic

Recoil atoms

Recoil energy

Recoil energy loss

Recoil line

Recoil loss

Recoiling

Thermal broadening

Thermalized transitions

Thermalizing Recoils

Transition atomic energies

Transition broadening

Transition energies

Transition lines

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