Absolute absorption spectroscopy based on molecule interferometry
Absolute absorption spectroscopy based on molecule interferometry
We propose a 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 photoinduced 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.
63607
Nimmrichter, Stefan
12b3687e-0fc7-47c8-b4c4-f1e7aa9b1a3f
Hornberger, Klaus
fae9c720-e797-4227-853f-20bd1a7f53e9
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Arndt, Markus
5979dced-ae4f-4dce-8480-71fc8b6dee88
2008
Nimmrichter, Stefan
12b3687e-0fc7-47c8-b4c4-f1e7aa9b1a3f
Hornberger, Klaus
fae9c720-e797-4227-853f-20bd1a7f53e9
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Arndt, Markus
5979dced-ae4f-4dce-8480-71fc8b6dee88
Nimmrichter, Stefan, Hornberger, Klaus, Ulbricht, Hendrik and Arndt, Markus
(2008)
Absolute absorption spectroscopy based on molecule interferometry.
Physical Review A, 78 (6), .
(doi:10.1103/PhysRevA.78.063607).
Abstract
We propose a 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 photoinduced 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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Published date: 2008
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Local EPrints ID: 144277
URI: http://eprints.soton.ac.uk/id/eprint/144277
ISSN: 1050-2947
PURE UUID: 909f4962-b3a2-428e-bfb2-b95b5aab75b6
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Date deposited: 14 Apr 2010 08:17
Last modified: 14 Mar 2024 02:54
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Author:
Stefan Nimmrichter
Author:
Klaus Hornberger
Author:
Markus Arndt
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