For the first time the astrophysical factor of the B-10(p, alpha(0)) Be-7 reaction has been measured over a wide energy range, from 5 keV to 1.5 MeV, via the Trojan horse method (THM) applied to the quasifree H-2(B-10, alpha Be-7) (n) reaction. Therefore, the S(E) factor has been recast into absolute units by scaling in the energy range 200 keV-1.2 MeV to a recent measurement using the activation method, leading to a normalization uncertainty of 4%. AnR-matrix fit of theTHMdatawas performed, to parametrize the S factor, obtain spectroscopic information on the populated resonances, and compare with other recent experiments. Finally, a new determination of the screening potential U-e has been obtained, Ue = 240 +/- 50 eV, with a much smaller error than our previous measurement.

Measurement of the 10B( p,α0)7Be cross section from 5 keV to 1.5 MeV in a single experiment using the Trojan horse method

PUGLIA, SEBASTIANA;L. Lamia;CHERUBINI, SILVIO;G. D’Agata;G. L. Guardo;G. G. Rapisarda;ROMANO, Stefano;M. L. Sergi;R. Spartà;I. Lombardo;
2017-01-01

Abstract

For the first time the astrophysical factor of the B-10(p, alpha(0)) Be-7 reaction has been measured over a wide energy range, from 5 keV to 1.5 MeV, via the Trojan horse method (THM) applied to the quasifree H-2(B-10, alpha Be-7) (n) reaction. Therefore, the S(E) factor has been recast into absolute units by scaling in the energy range 200 keV-1.2 MeV to a recent measurement using the activation method, leading to a normalization uncertainty of 4%. AnR-matrix fit of theTHMdatawas performed, to parametrize the S factor, obtain spectroscopic information on the populated resonances, and compare with other recent experiments. Finally, a new determination of the screening potential U-e has been obtained, Ue = 240 +/- 50 eV, with a much smaller error than our previous measurement.
REACTION-RATES, COMPILATION, NUCLEI.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/50764
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