Absolute absorption spectroscopy based on molecule interferometry

Details Absolute absorption spectroscopy based on molecule interferometry Absolute absorption spectroscopy based on molecule interferometry

2008-11-07

arxiv.org/abs/0811.1141v1

Phys. Rev. A *78*, 063607 (2008)

Physics

Quantum Physics

8 pages, 4 figures, RevTeX4

Scientific paper

10.1103/PhysRevA.78.063607

We propose a new method to measure the absolute photon absorption cross section of neutral molecules in a molecular beam. It is independent of our knowledge of the particle beam density, nor does it rely on photo-induced fragmentation or ionization. The method is based on resolving the recoil resulting from photon absorption by means of near-field matter-wave interference, and it thus applies even to very dilute beams with low optical densities. Our discussion includes the possibility of internal state conversion as well as fluorescence. We assess the influence of various experimental uncertainties and show that the measurement of absolute absorption cross sections is conceivable with high precision and using existing technologies.

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