Letter | Published:

Imaging and focusing of neutrons by a zone plate

Naturevolume 287pages313314 (1980) | Download Citation

Subjects

Abstract

The use of refractive lenses for long-wavelength neutrons,although possible1, is severely limited by the fact that the refractive index differs only very slightly from unity (forexample, n − 1 = 2.3 × 10−4for quartz at λ = 20 Å). However, the fact thatonly a relatively thin layer of material is needed to produce an optical path difference of half a wavelength (for example, 2.4 µm of Cu at λ = 20 Å) led us to propose2 previously that neutrons could be focused by diffraction froma phase grating of variable spacing; this is , in fact, a type of zone plate. Zone plates, first described by Soret3, have been used satisfactorily over a large part of the electromagneticspectrum4–6. We now report the successful focusing and imaging of a slow neutron beam by means of a Fresnel zone plate8.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Gähler, R., Kalus, J. & Mampe, W. J. Phys. E13, 546 (1980).

  2. 2

    Klein, A. G. & Opat, G. I. in Neutron Interferometry (eds Bonse, U. & Rauch, H.) (Oxford University Press, 1980).

  3. 3

    Soret, J. L. Poggendorff's Annalen (1875).

  4. 4

    Andrews, Optics of the Electromagnetic Spectrum, 276 (Prentice-Hall,New Jersey, 1960).

  5. 5

    Wood, R. W. Phil. Mag. 45, 511 (1898).

  6. 6

    Niemann, B., Rudolph, D. & Schmahl, G. Optics Commun. 12, 160 (1974).

  7. 7

    Lord Rayleigh, Encyclopaedia Britannica 9th edn, Vol XXIV, 421 (Edinburgh, 1880).

  8. 8

    Benyon, T. D. & Pink, A. G. Nature 283, 749 (1980).

Download references

Author information

Affiliations

  1. School of Physics, University of Melbourne, Parkville, Victoria, Australia, 3052

    • P. D. Kearney
    • , A. G. Klein
    •  & G. I. Opat
  2. Institut Laue-Langevin, 38042, Grenoble Cedex, France

    • R. Gähler

Authors

  1. Search for P. D. Kearney in:

  2. Search for A. G. Klein in:

  3. Search for G. I. Opat in:

  4. Search for R. Gähler in:

About this article

Publication history

Received

Accepted

Issue Date

DOI

https://doi.org/10.1038/287313a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.