Skip to main content

Coherent Excitations and Raman Effect

  • Conference paper

Part of the Proceedings in Life Sciences book series (LIFE SCIENCES)

Abstract

At first sight measurement of the intensity ratio of antistokes to stokes Raman lines offers a straight forward method for determining the above thermal excitation required by theory. Early measurements /l/, in fact, have confirmed such excitation in the 100 cm-1 region. Clearly much more spectacular enhancement should be expected in the higher frequency region near 1000 cm-1, but, so far, stokes spectra only have been taken /2/. Figure 1 shows our result on the time dependence of the E.coli spectra indicating the appearance, and disapperance, of lines as the activity of the bacteria developes. The neighbourhood of the waterband at 1640 cm-1 provides the possibility for a rough estimate of intensities. At the high dilution required for the maintainance of the activity of the bacteria, an intensity enhancement of the order 105 would be required to find lines of the measured intensity /3/. As a consequence it can be concluded that a number of cells must oscillate coherently, for then the intensity is proportional to the square of the number of oscillating centers. This should explain why, in the time available to us, we were unable to reproduce this result.

Keywords

  • Laser Light
  • High Dilution
  • Rayleigh Scattering
  • High Frequency Region
  • Raman Line

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

In agreement with the authors, this paper was extracted from their notes and supplied with theoretical comments by myself. For personal reasons the authors are unable to continue this research.

H. Frölich

This is a preview of subscription content, access via your institution.

Buying options

Chapter
USD   29.95
Price excludes VAT (USA)
  • DOI: 10.1007/978-3-642-69186-7_2
  • Chapter length: 4 pages
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
eBook
USD   169.00
Price excludes VAT (USA)
  • ISBN: 978-3-642-69186-7
  • Instant PDF download
  • Readable on all devices
  • Own it forever
  • Exclusive offer for individuals only
  • Tax calculation will be finalised during checkout
Softcover Book
USD   219.99
Price excludes VAT (USA)

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Webb, S.J., Stoneham, M.E. and Fröhlich, H. Phys.Lett. A63, 407, (1977).

    Google Scholar 

  2. Webb, S.J., Phys.Rep. 60, 201, (1980).

    CrossRef  CAS  Google Scholar 

  3. Fröhlich, H. in Physics as Natural Philosophy, ed. Shimony, A. and Freshbach, H., MIT Press, Cambridge Masc., p. 286, (1982).

    Google Scholar 

  4. Niissle in-Crystal la, V. and Scheef ers-Borchel, U., Molec.gen. Genet. 169, 35, (1979).

    CrossRef  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and Permissions

Copyright information

© 1983 Springer-Verlag Berlin Heidelberg

About this paper

Cite this paper

Drissler, F., Santo, L. (1983). Coherent Excitations and Raman Effect. In: Fröhlich, H., Kremer, F. (eds) Coherent Excitations in Biological Systems. Proceedings in Life Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-69186-7_2

Download citation

  • DOI: https://doi.org/10.1007/978-3-642-69186-7_2

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-69188-1

  • Online ISBN: 978-3-642-69186-7

  • eBook Packages: Springer Book Archive