2003/05/16 by T. C. Black, P.R. Huffman, P. R. Huffman +8 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #High-pressure geophysics and materials #Nuclear Physics and Applications #Nuclear physics research studies #nucl-ex
paper · pdf · doi:10.1103/physrevlett.90.192502
published as Phys.Rev.Lett. 90 (2003) 192502 · 4 pages, 4 figures
openalex publication_date 2003/05/16 · arxiv created 2003/05/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
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 bnd=(6.665\ifmmode±\else\textpm\fi0.004) fm in agreement with the world average of previous measurements using different techniques, bnd=(6.6730\ifmmode±\else\textpm\fi0.0045) fm. We compare the new world average for the nd coherent scattering length bnd=(6.669\ifmmode±\else\textpm\fi0.003) fm 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 2and=(0.65\ifmmode±\else\textpm\fi0.04) fm.