An "archaeological" quest for galactic supernova neutrinos

Details An "archaeological" quest for galactic supernova neutrinos An "archaeological" quest for galactic supernova neutrinos

2009-01-06

arxiv.org/abs/0901.0581v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

PDFLateX, 22 pages, 2 Tables, 6 figures

Scientific paper

10.1088/1475-7516/2009/04/029

We explore the possibility to observe the effects of electron neutrinos from past galactic supernovae, through a geochemical measurement of the amount of Technetium 97 produced by neutrino-induced reactions in a Molybdenum ore. The calculations we present take into account the recent advances in our knowledge of neutrino interactions, of neutrino oscillations inside a supernova, of the solar neutrino flux at Earth and of possible failed supernovae. The predicted Technetium 97 abundance is of the order of 10^7 atoms per 10 kilotons of ore, which is close to the current geochemical experimental sensitivity. Of this, 10-20% is from supernovae. Considering the comparable size of uncertainties, more precision in the modeling of neutrino fluxes as well as of neutrino cross sections is required for a meaningful measurement.

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