Experimental determination of the Be + p scattering lengths

C. Angulo, M. Azzouz, P. Descouvemont, G. Tabacaru, D. Baye, M. Cogneau, M. Couder, T. Davinson, A. Di Pietro, P. Figuera, M. Gaelens, P. Leleux, M. Loiselet, A. Ninane, F. de Oliveira Santos, R.G. Pizzone, G. Ryckewaert, N. de Séréville, F. Vanderbist

Research output: Contribution to journalArticlepeer-review

Abstract

The 7e + 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 7e 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 (E = 0.77 MeV). The ℓ = 0 scattering lengths a = 25±9 fm (channel spin I = 1) and a =-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 7e(p,γ)B reaction are discussed.
Original languageEnglish
Pages (from-to)211-229
Number of pages19
JournalNuclear Physics A
Volume716
DOIs
Publication statusPublished - 24 Mar 2003

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