Abstract
We have performed the first high precision measurement of the coherent neutron scattering length of deuterium in a pure sample using neutron interferometry. We find in agreement with the world average of previous measurements using different techniques, . We compare the new world average for the coherent scattering length to calculations of the doublet and quartet scattering lengths from several modern nucleon-nucleon potential models with three-nucleon force (3NF) additions and show that almost all theories are in serious disagreement with experiment. This comparison is a more stringent test of the models than past comparisons with the less precisely determined doublet scattering length of .
- Received 19 November 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.192502
©2003 American Physical Society