Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment

Physics – Nuclear Physics – Nuclear Experiment

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Corresponding author: D. Steele (dsteele@lanl.gov), 25 pages, 2 figures

Scientific paper

Neutrinoless double-beta decay experiments can potentially determine the Majorana or Dirac nature of the neutrino, and aid in understanding the neutrino absolute mass scale and hierarchy. Future 76Ge-based searches target a half-life sensitivity of >10^27 y to explore the inverted neutrino mass hierarchy. Reaching this sensitivity will require a background rate of <1 count tonne^-1 y^-1 in a 4-keV-wide spectral region of interest surrounding the Q value of the decay. We investigate the overburden required to reach this background goal in a tonne-scale experiment with a compact (copper and lead) shield based on Monte Carlo calculations of cosmic-ray background rates. We find that, in light of the presently large uncertainties in these types of calculations, a site with an underground depth >~5200 meters water equivalent is required for a tonne-scale experiment with a compact shield similar to the planned 40-kg MAJORANA DEMONSTRATOR. The required overburden is highly dependent on the chosen shielding configuration and could be relaxed significantly if, for example, a liquid cryogen and water shield, or an active neutron shield were employed. Operation of the MAJORANA DEMONSTRATOR and GERDA detectors will serve to reduce the uncertainties on cosmic-ray background rates and will impact the choice of shielding style and location for a future tonne-scale experiment.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-145513

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.