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The accurate characterisation of the surface density of thin deposits is of highest importance in certain experiments. However, if accuracies better than ±0.5% are to be quoted, careful consideration of secondary effects is necessary, as these effects may generate serious errors. The details of the radial surface density distribution, the formation of edge effects, and the evaluation of effective deposit diameters are discussed for the case of measurements and observations made during the preparation and characterisation of 6LiF and 10B reference deposits, which were employed in a recent determination of the free neutron lifetime. Theoretical considerations are in excellent agreement with the experimental data obtained.

Additional information

Authors: TAGZIRIA H ET AL., JRC Geel (BE);GILLIAM D M, National Institute of Standards and Technology, Gaithersburg, MD (US);SCOTT R D, Scottish Universities and Reactor Centre, Glasgow (GB);BYRNE J ET AL., University of Sussex, School of Mathematical and Physical Sciences, Brighton (GB)
Bibliographic Reference: Paper presented: 15th World Conference of the International Nuclear Target Development Society, Santa Fé, California (US), Sept. 10-15, 1990
Availability: Available from (1) as Paper EN 35700 ORA
Record Number: 199011657 / Last updated on: 1994-12-02
Original language: en
Available languages: en