6533b836fe1ef96bd12a087c

RESEARCH PRODUCT

First measurement of the helicity dependence of 3He photoreactions in the Δ(1232) resonance region

David HamiltonL.v. FilʼkovA. PolonskiD. G. MiddletonD. G. MiddletonM. ThielM. OberleB. OussenaWerner HeilA. BraghieriJ. R. M. AnnandD. P. WattsF. RigamontiT. RostomyanD. I. SoberB. KruscheV. S. BekrenevV. LisinH. BerghäuserK. LivingstonT. C. JudeP. PedroniA. StarostinO. JahnA. NikolaevSusanna CostanzaH. J. ArendsD. I. GlazierA. FixP. Aguar BartoloméM. RomaniukG. GiardinaB. M. K. NefkensJ. C. McgeorgeR. BeckJ. KrimmerS. CherepnyaF. PheronD. WerthmüllerI. KeshelashviliD. HornidgeJ. MancellM. OstrickA. KulbardisI. JaegleR. KondratievI. SupekJ. AhrensI. J. D. MacgregorVolker MetagE. HeidH. OrtegaS. SchumannP. B. OtteD. HowdleP. DrexlerS. N. PrakhovAndy ThomasM. UnverzagtW. J. BriscoeS. P. KruglovG. RosnerA. N. MushkarenkovV. L. KashevarovV. L. KashevarovD. M. ManleyM. Korolija

subject

PhysicsNuclear reactionNuclear and High Energy PhysicsPhoton010308 nuclear & particles physicsNuclear TheoryNucleon spin structurePhoton energy01 natural sciencesResonance (particle physics)HelicityNuclear physics0103 physical sciencesNeutronNuclear Experiment010306 general physicsCrystal Ball

description

The first measurement of the helicity dependence of the total inclusive 3He photo-absorption cross section and of the partial cross sections for several reaction channels was carried out at MAMI (Mainz) in the photon energy range between 150 and 500 MeV. The experiment used the large acceptance Crystal Ball spectrometer, complemented by charged particle and vertex detectors, a circularly polarised tagged photon beam and a longitudinally polarised high-pressure 3He gas target. The results obtained give information on the GDH integral on 3He and on the neutron and allow an investigation of the modifications of nucleon properties inside 3He.

yearjournalcountryeditionlanguage
2013-06-01Physics Letters B
https://doi.org/10.1016/j.physletb.2013.04.057