Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-05-21
Phys.Rev.Lett. 90 (2003) 192502
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.90.192502
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 b_nd = (6.665 +/- 0.004) fm in agreement with the world average of previous measurements using different techniques, b_nd = (6.6730 +/- 0.0045) fm. We compare the new world average for the nd coherent scattering length b_nd = (6.669 +/- 0.003) 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 nuclear doublet scattering length of a_nd = (0.65 +/- 0.04) fm.
Arif Md.
Black T. C.
Huffman P. R.
Jacobson Leif D.
Kaiser Hartmut
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