6-8 April 2009
University of Oxford
Europe/London timezone

Double Beta Decay of Zr96 using NEMO-3 and Calorimeter R&D for SuperNEMO

8 Apr 2009, 12:15
15m
Dennis Sciama Lecture Theatre (University of Oxford)

Dennis Sciama Lecture Theatre

University of Oxford

Speaker

Matthew Kauer (University College London)

Description

Using 911 days of data from NEMO-3, a world best 2vBB decay half-life of Zr96 has been measured to be [2.36 +/-0.17(stat) +0.17 -0.14(syst)] x 10^19 yr. The obtained limit on the 0vBB decay half-life at the 90% confidence level is 8.5 x 10^21 yr which leads to the limit on the effective Majorana neutrino mass < 7.4 - 20.3 eV, using the RQRPA and pnQRPA nuclear models. SuperNEMO is a next-generation double beta decay experiment based on the successful tracking plus calorimetry design approach of the NEMO-3. SuperNEMO can study a range of isotopes, the baseline isotopes are Se82 and possibly Nd150. The total isotope mass will be 100-200 kg. A sensitivity to a 0vBB half-life greater than 10^26 years can be reached which gives access to Majorana neutrino masses of 50-100 meV. One of the main challenges of the SuperNEMO R&D is the development of the calorimeter with an energy resolution of 4% FWHM at 3 MeV (Q(bb) value of Se82). This unprecedented milestone has been achieved using low density plastic scintillator coupled to high quantum efficiency photomultiplier tubes.

Primary author

Matthew Kauer (University College London)

Presentation Materials