Can you explain the factors which you consider to be important in establishing the active temperature ranges? Is it particle size, nuclear mass etc etc.
one need know the experiment conditions.
as for particle size- these are deutrones in crystal structure (the heavy snow for example). the heavy snow -because it has litltle narrow boundary "needles" (may be- I hope-nm- needles)
for more deatails I need an information about experiment conditions / Unfortunatly I have no opportunitiy to perform