The cross section of 3He(3He,2p)4He measured at solar energies.

Details The cross section of 3He(3He,2p)4He measured at solar energies. The cross section of 3He(3He,2p)4He measured at solar energies.

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..70..382j&link_type=abstract

Nuclear Physics B - Proceedings Supplements, vol. 70, issue 1-3, pp. 382-385

Physics

Nuclear Physics

1

Nucleosynthesis: Sun, Nuclear Reactions: Detectors

Scientific paper

The authors report on the status of the 3He(3He,2p)4He experiment at the underground accelerator facility LUNA (Gran Sasso). The lowest projectile energies for the measured cross section correspond already to energies below the center of the solar Gamow peak (E0 = 22 keV). The data provide no evidence for the existence of a hypothetical resonance in the energy range investigated. Although no extrapolation is needed anymore (except for energies at the low-energy tail of the Gamow peak), the data must be corrected for the effects of electron screening, clearly observed the first time for the 3He(3He,2p)4He reaction. The effects are however larger than expected and not understood, leading presently to the largest uncertainty on the quoted S(0) value for bare nuclides (=5.40 MeVb).

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