Abstract
The fusion reactions and have been studied from to 4.75 MeV by -ray spectroscopy using a C target with ultralow hydrogen contamination. The deduced astrophysical factor exhibits new resonances at , in particular, a strong resonance at , which lies at the high-energy tail of the Gamow peak. The resonance increases the present nonresonant reaction rate of the channel by a factor of 5 near . Because of the resonance structure, extrapolation to the Gamow energy is quite uncertain. An experimental approach based on an underground accelerator placed in a salt mine in combination with a high efficiency detection setup could provide data over the full energy range.
- Received 8 November 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.122501
©2007 American Physical Society