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The Optimisation of Nuclear Parameters Used for Silicon Irradiation in the Harwell Research Reactors

  • N. W. Crick

Abstract

Irradiations of semi-conductor silicon for the purposes of neutron doping have been carried out in DIDO and PLUTO, the materials-testing reactprs at Harwell, since 1975. The reactors are fuelled with highly enriched uranium in a core which is cooled and moderated with heavy water. At the present time irradiations are carried out in the outer graphite reflector where the neutron spectrum is well thermalised, resulting in relatively low damage rates from fast neutrons. (FIG. 1) Reactivity of the core is partly controlled by a combination of burnable poisons so that flux changes caused by the movement of control absorbers are kept to a minimum.

Keywords

Neutron Flux Heavy Water Thermal Flux Neutron Dose Neutron Cross Section 
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References

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    J.M. Meese and P.J. Glairon, Resistivity Fluctuations in Highly Compensated NTD Silicon. 2nd Int. Conf. of Neutron Transmutation Doping in Semiconductors. Un. of Missouri (1979).Google Scholar
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    D.S. Hughes and R.B. Schwartz, Neutron Cross Sections. U.S. Gov’t. Printing Office (1958).Google Scholar
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    J.W. Cleland, Proc. Int. School of Physics - Course XVIII - Radiation Damage in Solids (Academic Press 1962 ).Google Scholar
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    H.M. Janus and O. Malmros, Application of Thermal Neutron Irradiation for Large Scale Production of Homogeneous Phosphorus Doping of Floatzone Silicon. IEEE Trans, on Electronic Devices, Vol. ED-23 No. 8. Aug. 1978.Google Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • N. W. Crick
    • 1
  1. 1.Materials Physics DivisionAEREHarwell, OxfordshireEngland

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