• Accepted Paper

First measurement of Compton scattering on 3He at HIγS

J. Zhou et al.

Phys. Rev. Lett. - Accepted 2 October, 2026

DOI: https://doi.org/10.1103/gn45-7lpx

Abstract

The world’s first Compton scattering measurements on a 3He target were performed to probe neutron electromagnetic polarizabilities. Differential cross sections were measured at laboratory angles of 40∘, 55∘, 90∘, 115∘, 150∘, using circularly polarized, quasi-monoenergetic photon beams at weighted mean energy values of 61.5 and 97.1 MeV from the High Intensity γ-ray Source at the Triangle Universities Nuclear Laboratory. Comparisons with chiral effective field theory show good agreement at 97.1 MeV but over-prediction at 61.5 MeV, motivating further theoretical development.

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