Compton scattering from He4 at the TUNL HIγS facility

Authors:
  • MAM. W. Ahmed
    M. W. Ahmed
  • ABA. Banu
    A. Banu
  • CBC. Bartram
    C. Bartram
  • BCB. Crowe
    B. Crowe
  • MEM. Emamian
    M. Emamian
  • GFG. Feldman
    G. Feldman
  • HGH. Gao
    H. Gao
  • DGD. Godagama
    D. Godagama
  • HGH. W. Grießhammer
    H. W. Grießhammer
  • CHC. R. Howell
    C. R. Howell
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Abstract
Differential cross sections for elastic Compton scattering from He4 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 He4 to fully interpret the data.
Funding Information
  • U.S. Department of Energy (DE-SC0016656, DE-SC0015393, DE-FG02-97ER41046, DE-SC0005367, DE-FG02-97ER41033, DE-SC0016581, DE-FG02-97ER41041, DE-FG02-03ER41231, DE-FG02-97ER41042)
  • National Science Foundation (NSF-PHY-1309130, NSF-PHY-1714833, NSF-PHY-0619183)
  • George Washington University
  • Natural Sciences and Engineering Research Council of Canada

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