Journal
PHYSICAL REVIEW C
Volume 95, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.95.035801
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Funding
- Italian Ministry of Education
- University and Research (MIUR) under grant LNS-Astrofisica Nucleare (fondi premiali) [RFBR082838, FIRB2008]
- FAPESP
- CNPq
- AMVIS project [LH1101]
- US Department of Energy
- Office of Science, Office of Nuclear Science [DEFG02- 93ER40773]
- US National Science Foundation [PHY-1415656]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1415656] Funding Source: National Science Foundation
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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.
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