| Title | Measurement of the doubly-polarized 3He(gamma,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule / |
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| Authors | Laskaris, G ; Yan, X ; Mueller, J.M ; Zimmerman, W.R ; Xiong, W ; Ahmed, M.W ; Averett, T ; Chu, P.-H ; Deltuva, Arnoldas ; Flower, C ; Fonseca, A.C ; Gao, H ; Golak, J ; Heideman, J.N ; Karwowski, H.J ; Meziane, M ; Sauer, P.U ; Skibinski, R ; Strakovsky, I.I ; Weller, H.R ; Witała, H ; Wu, Y.K |
| DOI | 10.1016/j.physletb.2015.09.065 |
| Full Text |
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| Is Part of | Physics letters. B... Amsterdam : Elsevier Science BV. 2015, Vol. 750, p. 547-551.. ISSN 0370-2693 |
| Keywords [eng] | photodisintegration ; three-nucleon system ; Coulomb interaction |
| Abstract [eng] | We report new measurements of the double-polarized photodisintegration of 3 He at an incident photon energy of 16.5 MeV, carried out at the High Intensity γ -ray Source (HI γ S) 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. |
| Published | Amsterdam : Elsevier Science BV |
| Type | Journal article |
| Language | English |
| Publication date | 2015 |
| CC license |
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