Compton scattering from 4He at the TUNL HIγS facility
Abstract
Differential cross sections for elastic Compton scattering from 4He have been measured with high statistical precision at the High Intensity γ-ray Source at laboratory scattering angles of 55, 90, and 125 using a quasi-monoenergetic photon beam with a weighted mean energy value of 81.3 MeV. The results are compared to previous measurements and similar fore-aft asymmetry in the angular distribution of the differential cross sections is observed. This experimental work is expected to strongly motivate the development of effective-field-theory calculations of Compton scattering from 4He to fully interpret the data.
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