Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005omeg.conf..505m&link_type=abstract
ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2003. Held 17-19 November 2003 in RIKEN, Wako, Saitama, Japan. Edited by M Terasawa,
Astronomy and Astrophysics
Astronomy
2
Scientific paper
The observational space map of 1.809-MeV gamma rays - coming from the decay of 26Al - taken by COMPTEL requires the sources and their nucleosynthetic activity to be unveiled. One suggestion for the observation is the explosive hydrogen burning process which occurs in novae or X-ray bursts. Two capture reactions such as 25 Al(p,γ)26Si and 26Si(p,γ)27P are of great importance in the production of 1.809-MeV gamma rays. Resonance states within the Gamow window should be precisely known to determine their reaction rates. As for the latter reaction, only a few levels in 27P have been known above the proton threshold in comparison with many levels known in its mirror nucleus 27Mg. We studied proton resonances in 26Si and 27P by the elastic scattering at low energies, respectively using low-energy 25Al and 26Si radioactive ion beams available from the CRIB facility at CNS, University of Tokyo. We carried out an experiment to investigate proton resonances in 26Si up to EC.M. = 3.016 MeV, especially to determine the resonance parameters of the states at Ex = 7.019 and 8.120 MeV. We also measured the elastic scattering of p + 26Si up to EC.M. = 3.290 MeV.
Guimaraes Valdir
He Jingsong
Kato Shoji
Kim J. C.
Kubono Shigeru
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