7 ‫תרגיל‬
2008
‫רן סלם‬
:‫ספקטרוסקופיה‬
1. Calculate the Doppler broadening for Rb atoms in room temperature.
2. How can we measure atomic transitions spaced closer then their Doppler
broadening?
3. Cross over picks: Explain what are the crossover picks and prove that the
probe and the pump beams can excite the atoms moving to the opposite
  1
directions with velocity: V  2
. Where w1and w2 are the shifted
2k
resonance frequencies of the atoms due to their velocities.
4. Why in Li the crossover pick is negative?