Compton scattering from He 4 at the TUNL HIγ S facility

X. Li, M. W. Ahmed, A. Banu, C. Bartram, B. Crowe, E. J. Downie, M. Emamian, G. Feldman, H. Gao, D. Godagama, H. W. Grießhammer, C. R. Howell, H. J. Karwowski, D. P. Kendellen, M. A. Kovash, K. K.H. Leung, D. Markoff, S. Mikhailov, R. E. Pywell, M. H. SikoraJ. A. Silano, R. S. Sosa, M. C. Spraker, G. Swift, P. Wallace, H. R. Weller, C. S. Whisnant, Y. K. Wu, Z. W. Zhao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish
Article number034618
JournalPhysical Review C
Issue number3
StatePublished - Mar 2020

Bibliographical note

Funding 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.

Publisher Copyright:
© 2020 American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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