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Updated: May 31, 2026

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
Model-independent calculation of radiative neutron capture on lithium-7
1Department of Physics and Astronomy and High Performance Computing Collaboratory, Mississippi State University, Mississippi State, Mississippi 39762, USA. grupak@u.washington.edu
Abstract:
The radiative neutron capture on lithium-7 is calculated model independently using a low-energy halo effective field theory. The cross section is expressed in terms of scattering parameters directly related to the S-matrix elements. It depends on the poorly known p-wave effective range parameter r(1). This constitutes the largest uncertainty in traditional model calculations. It is explicitly demonstrated by comparing with potential model calculations. A single parameter fit describes the low-energy data extremely well and yields r(1)≈-1.47 fm(-1).
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