title: Precision measurement of the n-3He incoherent scattering length using neutron interferometry.
abstract: 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.
authors.affiliation: Tulane University, New Orleans, Louisiana 70118, USA.
authors.forename: M G
authors.initials: MG
authors.lastname: Huber
authors.forename: M
authors.initials: M
authors.lastname: Arif
authors.forename: T C
authors.initials: TC
authors.lastname: Black
authors.forename: W C
authors.initials: WC
authors.lastname: Chen
authors.forename: T R
authors.initials: TR
authors.lastname: Gentile
authors.forename: D S
authors.initials: DS
authors.lastname: Hussey
authors.forename: D A
authors.initials: DA
authors.lastname: Pushin
authors.forename: F E
authors.initials: FE
authors.lastname: Wietfeldt
authors.forename: L
authors.initials: L
authors.lastname: Yang