Precision measurement of the n-3He incoherent scattering length using neutron interferometry.

نویسندگان

  • M G Huber
  • M Arif
  • T C Black
  • W C Chen
  • T R Gentile
  • D S Hussey
  • D A Pushin
  • F E Wietfeldt
  • L Yang
چکیده

We report the first measurement of the low-energy neutron-(3)He incoherent scattering length using neutron interferometry: b_{i};{'} = (-2.512 +/- 0.012 stat +/- 0.014 syst) fm. This is in good agreement with a recent calculation using the AV18 + 3N potential. The neutron-(3)He scattering lengths are important for testing and developing nuclear potential models that include three-nucleon forces, effective field theories for few-body nuclear systems, and neutron scattering measurements of quantum excitations in liquid helium. This work demonstrates the first use of a polarized nuclear target in a neutron interferometer.

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عنوان ژورنال:
  • Physical review letters

دوره 102 20  شماره 

صفحات  -

تاریخ انتشار 2009