NaI32 - Results


Background spectrum of the scintillators
Background spectrum of the scintillators in the best conditions found along the experiment. It corresponds to an exposure of 4613.6 kg day and has been used to derive the exclusion plots in the conventional method of confronting expected signal to observed background rate. The 46.5 keV gamma ray peak of the 210Pb and its associated iodine x-ray escape peak are clearly identified in the spectrum.


Exclusion plots for coherent interactions
Exclusion plots for coherent interactions in units of the Dirac neutrino cross section obtained by comparing the predicted signal with the observed background (dashed line) and with the annual modulation search (solid line). The annual modulation search gets exclusion plots two order of magnitude stronger than those derived from the conventional method.


Exclusion plots for spin-dependent interactions
Exclusion plots for spin-dependent interactions in units of the Majorana neutrino cross section obtained by comparing the predicted signal with the observed background (dashed line) and with the annual modulation search (solid line). The annual modulation search gets exclusion plots two order of magnitude stronger than those derived from the conventional method.


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