Hypersharp Resonant Capture of Anti-Neutrinos

Details Hypersharp Resonant Capture of Anti-Neutrinos Hypersharp Resonant Capture of Anti-Neutrinos

2008-06-04

arxiv.org/abs/0806.0839v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4p, 1fig, 3tables

Scientific paper

Recent ideas suggest that the 18.6 keV antineutrino (nuebar) line from 2-body decay of 3H in crystals is emitted with natural width, motionally narrowed by lattice vibrations as in recoilless emission. It can be resonantly captured in 3He with geometrical cross section sigma ~10 ^ -17 cm2. A key technique solves a basic obstacle for achieving resonance--the chemical difference of H and He in metals. The low nue energy, the high sigma and the hypersharp sensitivity DELTA E/E ~10^--29 make an extraordinary tool for bench scale tests of nue theta13 oscillations and predicted Planck length limits on nuclear level widths in models of quantum gravity.

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