neutron probe aluminium tube

[Magdeline Pokar <M.Pokar@earth.leeds.ac.uk>]

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Dear subscribers,

I have a slight dilemma. I have recently installed a neutron probe aluminium
access tube and the hole drilled for installation is slightly larger than
the tube (only about < 5mm diameter). Should I leave the small air gap as it
is or fill it with bentonite? Which will affect my readings more?

Thanks

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Magdeline Pokar,		Tel: 0113-2335231 (O)
School of Earth Sciences,	     0113-2343795 (H)	
University of Leeds,		Fax: 0113-2335259
Woodhouse Lane,			email: M.Pokar@earth.leeds.ac.uk
Leeds, West Yorkshire,
LS2 9JT. UK