Robin
There is of course another option. Just add Boron to the
compound
designed to reveal the tracks, then a single layer can be used
for
both purposes. The layer can then be made as thick as necessary
to
stop all the neutrons.
Yes . That is why I mentioned the commercial products - this
mixed-layer film containing boron is exactly what they are doing -
and hopefully have perfected.
It would be nice to know what percentage of neutrons are picked up
with these commercial films, and it probably varies by supplier.
The beauty of film is that you have a "smoking gun" so to speak.
This is probably why Prof Kowalski is so sold on it, as it
eliminates many factors, and especially "experimenter
exuberance," which can distort other kinds of neutron counters
which demand rigorous calibration.
If Michael or anyone else, is going to try to reproduce this
Mizuno neutron effort (and it is a simple experiment if you have
LN on hand) and needs/wants assistance to design a good cheap
neutron setup, contact me offlist and perhaps we can figure out
the best way to go, given what you have to work with.
Jones
