0198506961.pdf
146 The interaction of atoms with radiation face only emits electrons ifω>Φ. Semiclassical theory explains this observation ...
7.9 Conclusions 147 feature for all broadening mechanisms.^57 In particular, this means that^57 Both for mechanisms that are hom ...
148 The interaction of atoms with radiation Exercises (7.1)Averaging over spatial orientations of the atom (a) Light linearly po ...
Exercises for Chapter 7 149 (7.6)The properties of some transitions in hydrogen The table gives the values ofA 21 for transition ...
150 The interaction of atoms with radiation (e) Calculate f 12 for the 3s–3p transition of sodium. (A 21 =Γ=2π× 107 s−^1 .) (f) ...
Doppler-free laser spectroscopy 8 8.1 Doppler broadening of spectral lines 151 8.2 The crossed-beam method 153 8.3 Saturated abs ...
152 Doppler-free laser spectroscopy In this section, we consider the Doppler effect on the absorption by a gas where each atom a ...
8.2 The crossed-beam method 153 In the formula, the atomic massMmust be expressed in atom mass units, e.g.M= 1 a.m.u. for atomic ...
154 Doppler-free laser spectroscopy Fig. 8.2Laser spectroscopy of a colli- mated atomic beam. The component of atomic velocity a ...
8.3 Saturated absorption spectroscopy 155 background gas molecule deflects an atom out of the highly-collimated beam. Example 8. ...
156 Doppler-free laser spectroscopy gH(ω−kv)≡δ(ω−ω 0 −kv)thatpicksoutatomsmovingwithvelocity v= ω−ω 0 k . (8.12) Integration ove ...
8.3 Saturated absorption spectroscopy 157 This is the same as the modification we made in going from eqn 7.70 to 7.72 but applie ...
158 Doppler-free laser spectroscopy BS (a) (b) (c) } } } Detector Pump Probe beam beam Laser Sample M1 Signal withoutpump beam S ...
8.3 Saturated absorption spectroscopy 159 right-hand sides of Fig. 8.4(c). Close to resonance,ωω 0 ,bothbeams interact with ato ...
160 Doppler-free laser spectroscopy Cross-over X Intensity of probebeam at detector (a) (b) Fig. 8.5The formation of a cross-ove ...
8.3 Saturated absorption spectroscopy 161 D D D D H H H H Frequency Frequency Frequency (a) (b) (c) Free spectral range Free spe ...
162 Doppler-free laser spectroscopy Fig. 8.7Spectroscopy of the Balmer- αtransition. (a) The levels with prin- cipal quantum num ...
8.4 Two-photon spectroscopy 163 (atoms in 2s^2 S 1 / 2 level) but it was not resolved by optical techniques before the invention ...
164 Doppler-free laser spectroscopy When twice the laser frequencyωequals the atomic resonance frequency 2 ω=ω 12 all the atoms ...
8.4 Two-photon spectroscopy 165 Example 8.3 Two-photon spectroscopy of the1s–2stransition in atomic hydrogen The 1s–2s two-photo ...
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