The absolute cross section sigma(E) of the radiative capture reaction p(Be-7,gamma)B-8 at the center-of mass energy E = 992 keV has been measured using a radioactive 7Be ion beam and a windowless gas target system filled with H-2 gas. The B-8 residual nuclides were detected with a recoil separator consisting of momentum and velocity filters and a BE E detector telescope. The B-8 yield was observed concurrently with the Be-7+p elastic scattering yield, relating sigma(E) to the Rutherford scattering cross section. The resulting value, sigma(E) = 0.41+/-0.11 mu b, leads to an S(E) factor at zero energy of S(0) = 16+/-4 eV b, in fair agreement with recommended values.
Absolute cross section of p(7Be,γ)8B using a novel approach / L., Gialanella; F., Strieder; L., Campajola; A., D'Onofrio; U., Greife; G., Gyurky; Imbriani, Gianluca; G., Oliviero; A., Ordine; Roca, Vincenzo; C., Rolfs; Romano, Mario; D., Rogalla; C., Sabbarese; E., Somorjai; F., Terrasi; H. P., Trautvetter. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - STAMPA. - 7:(2000), pp. 303-305. [10.1007/PL00013599]
Absolute cross section of p(7Be,γ)8B using a novel approach
IMBRIANI, GIANLUCA;ROCA, VINCENZO;ROMANO, MARIO;
2000
Abstract
The absolute cross section sigma(E) of the radiative capture reaction p(Be-7,gamma)B-8 at the center-of mass energy E = 992 keV has been measured using a radioactive 7Be ion beam and a windowless gas target system filled with H-2 gas. The B-8 residual nuclides were detected with a recoil separator consisting of momentum and velocity filters and a BE E detector telescope. The B-8 yield was observed concurrently with the Be-7+p elastic scattering yield, relating sigma(E) to the Rutherford scattering cross section. The resulting value, sigma(E) = 0.41+/-0.11 mu b, leads to an S(E) factor at zero energy of S(0) = 16+/-4 eV b, in fair agreement with recommended values.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
