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Experimental determination of the $^{7}$Be + p scattering lengths

Abstract : The 7Be+p elastic cross section has been measured at the Centre de Recherches du Cyclotron RIB facility at Louvain-la-Neuve in the c.m. energy region from 0.3 to 0.75 MeV by bombarding a proton-rich target with a radioactive 7Be beam. The recoil protons have been detected in the angular range θc.m.=120.2°–131.1° and θc.m.=156.6°–170.2° using the LEDA system. From a R-matrix analysis of the cross section data, we obtain the energy and the width of the 1+ resonance (Ex=0.77 MeV). The ℓ=0 scattering lengths a01=25±9 fm (channel spin I=1) and a02=−7±3 fm (channel spin I=2) have been deduced. They are compared to values expected from charge-symmetry properties. Implications on the low energy S-factor of the 7Be(p, γ)8B reaction are discussed.
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Contributor : Michel Lion Connect in order to contact the contributor
Submitted on : Tuesday, April 29, 2003 - 11:27:42 AM
Last modification on : Monday, November 30, 2020 - 11:04:04 AM




C. Angulo, M. Azzouz, P. Descouvement, G. Tabacaru, D. Baye, et al.. Experimental determination of the $^{7}$Be + p scattering lengths. Nuclear Physics A, Elsevier, 2003, 716, pp.211-229. ⟨10.1016/S0375-9474(02)01584-1⟩. ⟨in2p3-00012750⟩



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