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Title: Measurement of the doubly-polarized He 3 ( γ , n ) p p reaction at 16.5 MeV and its implications for the GDH sum rule

Journal Article · · Physics Letters. B

We report new measurements of the double-polarized photodisintegration of 3He at an incident photon energy of 16.5 MeV, carried out at the High Intensity γ-ray Source (HIγS) facility located at Triangle Universities Nuclear Laboratory (TUNL). The spin-dependent double-differential cross sections and the contribution from the three-body channel to the Gerasimov–Drell–Hearn (GDH) integrand were extracted and compared with the state-of-the-art three-body calculations. The calculations, which include the Coulomb interaction and are in good agreement with the results of previous measurements at 12.8 and 14.7 MeV, deviate from the new cross section results at 16.5 MeV. The GDH integrand was found to be about one standard deviation larger than the maximum value predicted by the theories.

Research Organization:
Duke Univ., Durham, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-03ER41231; FG02-03ER41033; FG02-03ER41041; DEC-2013/10/M/ST2/00420
OSTI ID:
1223329
Alternate ID(s):
OSTI ID: 1241895; OSTI ID: 1595344
Journal Information:
Physics Letters. B, Journal Name: Physics Letters. B Vol. 750 Journal Issue: C; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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