18 The low energy electron sample A study of the very low energy region of the T300 data has been carried out: electrons from few hundreds keV to some MeV were studied The main goal is the study of the backgrounds and the comparison with the Montecarlo results obtained by considering: Decays of 238 U and 232 Th contaminants of the aluminium Decays of 238 U and 232 Th contaminants of the aluminium walls in the inner detector walls in the inner detector Environmental neutron capture events in 40 Ar and 36 Ar Environmental neutron capture events in 40 Ar and 36 Ar spectral shape of the background  information on the spectral shape of the background, that affects a number of physics items in ICARUS, like solar and SN neutrinos; low energy calibration point  a low energy calibration point for the T600 detector; trigger rate  an estimation of the trigger rate for low energy events both in surface and in underground laboratory (LNGS); upper limit  an upper limit on the 39 Ar isotope activity in the T600 detector.
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