I think there is every possibility that what is measured is a secondary,
Bremstallung like effect.
One other factor is that whatever is being measured is outside the
alumina and steel container of the active ingredients of the glow
stick. If the gamma was generated from the 'active ingredients' some
would be absorbed by the alumina and steel, and absorbance normally
increases at low energies, so having the largest gamma emmision at the
low energies is counter intuitive. Interestingly this puts the results
in a similar place to Vladimir Vysotskii's measurements of gamma rays
from water cutting systems, where the peaks is at 1 to 5 kHz. He came
to the conclusion that what he was measuring was a secondary effect as a
result of interaction of primary energy/particles that was being
released with the outer surface of the steel container. Perhaps that is
also what is being seen here. It would be interesting to know where the
low energy peak was. Could it also have been in the 1-5kHz region
perhaps, in which case this could be very similar to the Vysotskii result.
On 11/03/2018 00:13, Bob Higgins wrote:
Neutral particle flux probably won't create substantial
electromagnetic noise and certainly no gamma. Best case is that it
would occasionally knock off some electrons that would excite the
characteristic x-ray emission of their host atom. They will excite
acoustic noise that would quickly be converted to heat.