Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..aprj14005j&link_type=abstract
American Physical Society, 2008 APS April Meeting and HEDP/HEDLA Meeting, April 11-15, 2008, abstract #J14.005
Astronomy and Astrophysics
Astrophysics
Scientific paper
A new phenomenon, heavy-ion fusion hindrance at extreme sub-barrier energies, has been discovered at ANL several years ago [1]. It was first observed in medium-mass systems, but later measurements and analyses showed that this might be a general behavior of heavy-ion fusion at extreme sub-barrier energies. As a result, it could also have an effect on fusion reactions of importance in nuclear astrophysics, such as ^12C + ^12C etc. [1]. The main difference between the systems studied earlier and astrophysically important fusion reactions is in the reaction Q-values, which are positive for lighter nuclei and negative for medium-mass systems. We have, therefore, recently studied fusion in the system ^28Si + ^30Si with a Q-value of 14.3 MeV, which is comparable to that of ^12C + ^12C (Q=13.9 MeV). Results from this experiment as well as from other studies will be discussed. [1] C.L. Jiang et al., Phys. Rev. Lett. 87, 052701 (2002); Phys. Rev. C73, 014603 (2006) ; Phys. Rev. C75, 015803 (2007).
Back Birger B.
Collon Ph.
Davids Cary N.
Ernst Rehm K.
Esbensen Henning
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