A new direct measurement of the absolute cross section of the 1H(7Be,γ)8B reaction has been performed in inverse kinematics at Ecm = 990 keV. A radioactive 7Be beam (Elab, = 8 MeV) and a windowless H2 gas target were used; 8B recoils were identified and counted by a recoil mass separator. The reaction cross section was derived by normalization to the elastic scattering cross section, measured in a separate run. The resulting value σr = 0.40 ± 0.12 μb yielded an astrophysical S-factor at zero energy So = 15.3 ± 4.5 eV b, in fair agreement with recommended values. © 2001 Elsevier Science B.V. All rights reserved.

Direct measurement of the absolute cross section of p(7Be,γ)8B

Terrasi F.;Gialanella L.;D'Onofrio A.;Lubritto C.;Sabbarese C.;
2001

Abstract

A new direct measurement of the absolute cross section of the 1H(7Be,γ)8B reaction has been performed in inverse kinematics at Ecm = 990 keV. A radioactive 7Be beam (Elab, = 8 MeV) and a windowless H2 gas target were used; 8B recoils were identified and counted by a recoil mass separator. The reaction cross section was derived by normalization to the elastic scattering cross section, measured in a separate run. The resulting value σr = 0.40 ± 0.12 μb yielded an astrophysical S-factor at zero energy So = 15.3 ± 4.5 eV b, in fair agreement with recommended values. © 2001 Elsevier Science B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/430111
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