XXth International Conference on Neutrino Physics and Astrophysics
High Statistics Measurement of 187-Re Beta Spectrum
for Direct Neutrino Mass Determination
We report on the status of the Milano calorimetric experiment to
measure the neutrino mass from the study of the 187-Re beta decay
end-point. A first high statistics measurement of 187-Re spectrum has
been performed with an array of 10 AgReO_4 crystals. The total mass
and measuring time are about 2.3 mg and 10600 hours x detector
respectively, giving a total statistics of approximately 6 x 10^6
187-Re beta decays. The measurement showed some systematics, mostly
due to the presence of a residual background which will be
discussed. After improving the set-up a second measurement with a new
array of 10 AgReO_4 crystals has just started. A preliminary analysis
of the data so far collected will be presented.
See PDF Version of Poster.