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.
|Physical Review C
|Published - Mar 2020
Bibliographical noteFunding Information:
This work is funded in part by the US Department of Energy under Contracts No. DE-FG02-03ER41231, No. DE-FG02-97ER41033, No. DE-FG02-97ER41041, No. DE-FG02-97ER41046, No. DE-FG02-97ER41042, No. DE-SC0005367, No. DE-SC0015393, No. DE-SC0016581, and No. DE-SC0016656, National Science Foundation Grants No. NSF-PHY-0619183, No. NSF-PHY-1309130, and No. NSF-PHY-1714833, and funds from the Dean of the Columbian College of Arts and Sciences at The George Washington University, and its Vice-President for Research. We acknowledge the financial support of the Natural Sciences and Engineering Research Council of Canada and the support of Eugen-Merzbacher Fellowship. We acknowledge the support of the accelerator scientists, engineers, and operators for assisting with the experimental setup, tuning up the accelerator system for high-energy operation, and for the high-quality production of the -ray beam.
© 2020 American Physical Society.
ASJC Scopus subject areas
- Nuclear and High Energy Physics