Paul, I have seen no credible demonstration that the Curie temperature
plays any role. This idea is mostly based on various arbitrary
models. In the nickel case, the effect becomes visible at higher
temperatures simply because the rate increases with temperature. The
effect can only be seen when the rate exceeds the sensitivity of the
calorimeter, which in the case of Ni generally requires higher
temperatures than required for Pd.
Ed
On Feb 22, 2013, at 1:37 PM, Paul Breed wrote:
>Radiation is the ONLY way an active material can be quickly
identified. This tool has been ignored. I'm trying to get you and
other people to use it
Understood, the system I'm building will have at least one GM tube
of equal or better sensitivity to the LND7313 you used in your
experiment....
in fact that instrument arrived yesterday.
Setting up a quick IR temp measurement from inside a hot pressurized
vessel is neither cheap nor easy...
I'm trying to determine if the radiation only is sufficient or if I
should stick to my original plan to put in IR temp sensing of the
material under test.
Its looking like a robust reliable IR sensing of small targets
inside the chamber will be about $5K and 4+ weeks of lead time.
The lower cost IR stuff won't go to high enough temperatures to be
useful...
(As others have pointed out one needs to be above the curie
temperature of the material being tested.)
Paul
